Hey everyone!
Was having a discussion a month or so ago with a friend about all the skins I had sold back in 2014/2015 for fractions of their current value and thought it'd be nice to actually be able to quantify the "loss" in a fun way.
So I made https://csfumble.com
The TL;DR on how it works is you authenticate with Steam and run a bookmarklet on the Steam Market which runs a small JS script that aggregates all your CS2/CSGO Steam Market sell transactions and checks the current-day value of each item.
NOTE: I tried to make the Steam Market history upload as low-friction as possible with the bookmarklet, but can 100% understand any suspicion about running arbitrary code in your browser (as you should be!). The bookmarklet source code is available on the site if you want to audit it yourself/run it through AI prior just to be safe.
Have fun and let me know if there's any bugs/issues as the site's only been in development for a month or so.