Okay, I’ll try the best to dig through my bank statements and estimate some things. Appreciate your help!

The sales of items I sold are on record, but the prices I paid for each item BEFORE selling are what’s lost to the void

That’s part of the problem, I did a sort of spring cleaning of my email a while back and don’t have a lot of those purchase confirmations :/

Wouldn’t that technically be tax evasion at that point?

I think (correct me if I’m wrong) the 3 year rule is only for getting a refund from the irs, right? And the problem with deducting expenses such as what I originally paid for the items is that I don’t have a huge portion of the receipts for those items. Do I have to just declare all of what I received as a payment at that point?

I was about half of the time. One of my hobbies is to collect rare vintage clothing, so it’s natural that lots of it would retain/increase in value. Yes I was turning a profit