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Thanks! This is an excellent question. Right now that button is lame. I guess it could go into inventory - that way we could take it someplace and re-sell it? Maybe we could buy a boat, completely fill it with junk, and trade it for something fancy? =) 

For the longest time, I thought it was some kind of lottery system -- pay X gold for a minor chance of a much larger gold payout (buying a piece of junk from a customer that turns out to be a rare artifact).

Yeah, a lottery would be simpler. I'd be fun to code a little slot-machine. =)