TOPIC: Gen Con Launch! Dedicated $8k Auction price tracking website!

Dedicated website improves data display, provides mobile friendly view
Just in time for Gen Con, I'm extremely excited to launch a new home for $8k auction price tracking data:
https://td-auctions.com/#/

Many of you know that I've provided auction sales data in Google Sheets for years. The sheets served me well and taught me a lot.

As the sheets grew though, I became less and less happy with them. They became more difficult to update, limited what I could do and just didn't represent my vision. The turning point was at Ring Con this year, trying to show the sheet on an iPhone (biggest one available) and having to scroll around everywhere.

A dedicated website solves a lot of my problems! Thankfully, my years of were fairly easy to transition. This means the data from the sheet now drives the website, meaning you still get the same, high-quality information you need to make informed bids.

Read on to learn more about the site!

Designed with mobile in mind
Like I said, I hated that showing off the sheet at RingCon meant opening a separate app, clicking through lots of tabs, and scrolling all over the place to see data.

I designed the website with mobile devices in mind. That means the Prices page (the old Dashboard) shows all important details on your phone. A quick toggle switches between Last 5 and Full Year prices.


Info like price Timelines and Transmute costs also scale down nicely, including abbreviations for items when there's not enough space:


There's even a dark mode so you don't sear your retinas checking prices in bed!


Prices for all years, always
Spreadsheets have some natural limitations on how much data you can show. You either need a separate sheet for each data point or a slicer to change the data. But because the sheet is multi-user, anyone using the slicer affects it for everyone else!

The site fixes this. The Prices, Onyx and Timelines let you choose which year you want to see. No more multiple sheets. No risk of changing someone's view. Just the data you need, the way you want it!


Transmute estimates evolved
The transmute estimates were one of my favorite things to hate in the sheet. They were fun to do, but very fiddly, difficult to update and prone to break. They also had probably the worst experience - lots of scrolling all over.

The new Transmutes page solves all that. It shows information progressively, with clear relationships between Relics and their associated Legendary transmutes. The system is much more flexible, easily bringing in prices for non-auction items like Herald and Golem tokens.


Analytics deliver insight
The far reaches of the spreadsheet always held some analysis of the current year and historical data. Unfortunately, they were always a mess, with source pivot tables and errant charts everywhere!

That changes now with the new Analytics tab. The site hides tables that aren't immediately useful while still showing you important data like historical token prices, comparison of auction close velocity and who held which auctions in which years.


What's next?
You tell me! Drop a line here, on Facebook or the True Dungeon Fans Discord .

I already have some ideas, like layering in augment data, re-adding the quartile analysis and adding an export option. I'd also like to get a UI designer to have a good, hard look at the site. Right now it's functional, but I'd like more intentionality in the design elements.

But I mostly want to know what's most important to you!

Updates Log
2026-08-11 (v2.0) - Build calculator, augments, quartiles

Congrats Marc on an awesome resource for the community. Nicely done!

Marc,

I really like what you have done. Kudo's to you. This is a fantastic upgrade from the spreadsheets. We all owe you. Look for me to get you a jar of salsa.

John O (Salsa John)

Marc, I'm sure the new improvements are amazing, but I just want you to know that your previous version was terrific and it was a resource that I used over and over again. The new version should be even better. Thanks for all that you do for the community.

Great data here. Crazy amount of detail. Thanks!

Thank you for this fantastic service to the community!

John Ohlinger (Salsa John) wrote: Marc,

I really like what you have done. Kudo's to you. This is a fantastic upgrade from the spreadsheets. We all owe you. Look for me to get you a jar of salsa.

John O (Salsa John)

Thanks for the kind words, both here and at Gen Con!!

Mike Steele wrote: Marc, I'm sure the new improvements are amazing, but I just want you to know that your previous version was terrific and it was a resource that I used over and over again. The new version should be even better. Thanks for all that you do for the community.

You are quite welcome!!

I loved the sheet. It was just becoming unmanageable - too much data in too many places. I will always have a soft spot for it, but I'm excited to build on the great foundation the earlier resource made!

BeLinda Mathie wrote: Thank you for this fantastic service to the community!

Happy to do it!!

This is insanely cool!

Amazing Data! Pretty incredible that we can now look at individual auction results from all recent auctions.

td-auctions.com — what's new since Gen Con

A few weeks ago, I launched td-auctions.com to replace my old $8k auction Google sheet. I said then that I had ideas for improvement but really wanted to know what was important to you!

Well, you let me know here, on Facebook and on Discord. I've done my best to back fill old favorites from the spreadsheet while adding new features that could only be done with a dedicated site.

Should I build or buy? There's a calculator for that
The Transmutes page always estimated build-vs-buy, but it assumed you were starting from scratch. Google Sheets are by nature a shared resource, so there wasn't a good way to let people input their on-hand trade goods and calculate the remaining cost.

The new Build Calculator lets you enter how many of each ingredient you already have. It subtracts them and tells you exactly what finishing the craft still costs — as an average and a minimum. You can even start from saying you have everything and subtract out what you're missing - faster if you already have most of the goods!

Example: Craven's Vampire Ring is about $1,671 to build if you bought everything from an auction. Already have the relic it upgrades from? Mark it on-hand and the cost to finish drops to $1,020. Enter in the trade goods you pulled from that awesome condensed treasure and watch the cost start to reflect reality!

You can override any ingredient price with your own number, like if you find a cheap Relic for sale.

The Browse Recipe button shows you the full recipe library, complete with a search box and filters by transmute level.

(Screenshot 1 — the Build Calculator with a source relic marked "on hand")


See what auctions are open right now
I want to help promote all the dedicated auctioneers out there. That's why the landing page for the original Google sheet was a list of open auctions. The only reason I didn't prioritize it at launch was that there weren't any open auctions at the time.

Now, any time an auction is live, a banner shows at the top of the Prices page (and the Auction Data tab) linking you straight to the forum thread or Trent's site. As I write this it's pointing at Alesiev's FINAL 2026 auction . When nothing is open, the banner quietly gets out of the way.

(Screenshot 2 — the Prices page with the live-auction banner and the new filters)


Augments, withholdings & Grunnel
This was a much requested feature from the old sheet. $8k auctions sometimes differ from the standard bundle. Auctioneers may withhold some tokens, add bonus tokens, or include props from our gracious goblin friend Grunnel. But all auctions must hit their funding goal.

To track all these add ons, there's a new Funding & Context analysis under the Analytics tab that lays it all out in one ledger: what was withheld (estimated from comparable sales to that date) against what got put back in as included bonuses (Golden Tickets, random Ultra Rares) and augments. If the additions cover the withholdings, the row goes green. Grunnel drops and the funding goal are shown alongside for context.

It finally answers the question we all wondered: did that "augmented" auction give more than it held back?

(Screenshot 3 — the auction ledger: withheld vs. included vs. augments)


Forum vs. Trent, apples to apples
Trent's auctions and forum auctions aren't quite the same animal, so every price page now has filters for it. Pick your Source (all / forum / Trent), narrow to a specific auction type (augmented, non-augmented, or with a Golden Ticket), and — my favorite — flip Trent prices to Reward-adjusted, which knocks off the ~10% you get back in points so you can compare a Trent buy to a forum buy on even footing.

Beyond min/avg/max: the full spread
Averages hide a lot. The old sheet had a Quartiles view to help visualize price spreads and outliers. I'm happy to bring this analysis back to the Analytics tab — a box-and-whisker plot and table for every token, so you can see the median, the middle-half of sales, and the outliers, not just the extremes. It's powered by roughly 18,000 individual lots (instead of aggregated averages), so the picture is a lot sharper than one price per auction.

(Screenshot 4 — quartile box plots by token)


Trade goods, the way you actually buy them
One little thing that I added for myself: a Show Trade 1 as 10x toggle on the Prices, Trends, and Quartiles views. Most auctions quickly adopted the 10x chips after their 2022 introduction. But basing prices on single chips gave more flexibility and compatibility with earlier data.

Now, there's an easy way to convert Trade 1 tokens as 10x chips instead. Just click the box and every Trade 1 price gets multiplied by 10, estimating the cost of the 10x chip. No more doing the math in your head at bid time.

Fewer tabs, less hunting
The site launched with eight distinct tabs - way too many. It's five now.

Onyx moved inside the Prices page as a simple All / Standard / Onyx switch, and the two charting pages (season timelines and year-over-year comparison) merged into a single Trends tab with a toggle. Same data, a lot less clicking around.

During this change, I also took the time to add direct linking to the individual views so it's easy to bookmark or share a direct link to your favorite tool.

(Screenshot 5 — the Trends tab)


What's next?
You tell me! A lot of these changes came from suggestions people tossed at me. I have some things I want to tackle next, like improved recipe accuracy on the transmute side.

This whole thing exists because I wanted it for my own bidding. If there's a number you wish you had before you place a bid, tell me. Drop a reply here, catch me on Discord or Facebook, and I'll see what I can build.

Thanks for the overwhelmingly positive response! Looking forward to 2027 auctions and the real test.