What is the most valuable item that you got cheap, cheap, almost by accident?

Like at auction or a garage sale or Goodwill? I bought a couple of shirts at Goodwill for a couple bucks each. I wore one of them yesterday, and decided I like it even more than I did when I saw it. Something about it, the way it felt, the way it flowed….I just checked the label. 100% silk. Yay! It was probably a $60 shirt new.

I’ve gotten a lot of other things, mostly furniture and knick knacks, that are worth more than what I paid for them. This is a pretty good example. I paid $10 for one at a second hand store, and about 15 years later I found another at a garage sale. I paid $5.00 for it.