Quoted from robertmee:If an owner signs in a machine and it is sold, he has to pay 10% upto $100. However, if he buys it back by bidding on it, he only has to pay $10.
This is how the auction place near me works too. Most pins there have been buybacks. And it is easy to overbid. I bought one at the last auction and bid $100 more than I said was my max. I got outbid by $25 and that upset me. So I bid another $25 and then repeated that process.