I agree with Grim on the auction thing. One other thing to add on the buying of equipment then fixing it up is that many times you will find that by the time you buy it and spend the money to fix it up you'll wish you'd never bought it. There are some items that just aren't worth fixing up.
As to the specific item you mention, the fact that they "got back on a bad debt" may have something to do with it. Despite the euphemism, it's a repossession.
I don't know if implement dealers sign recourse papers on implements they sell or not. If they do and it's full recourse, the dealer could well stand to lose money on this resale if the price doesn't cover all of the lenders added costs and fees.
If there is no recourse, then it probably still belongs to the lender who's trying not to lose money on it. The dealer has it on his lot for free and is trying to make a profit over the amount the lender needs. The lender could end up selling it for a lot less later, but you have to wait for them to realize the real market.
I've gone to regularly scheduled auctions (trucks) and bid on the same repo for two, three, four weeks in a row and been the top bidder on a repo only to have them turn down my bid. After a while, no one else even bids because they realize the lender is way off the money on what they want.
I was trying to buy a refrigerated semi trailer a while back and after a few weeks it got to the point where the auctioneer just asked me what I wanted to give this time. No one else even wanted to bid. On the fifth week, I put in a bid of $15,000 which was $6,000 less than I'd offered them week one. They then offered to accept my earlier $21,000 price which, of course, was no longer on the table. We eventually got together somewhere in the middle.
The lender finally realized there wasn't going to be anyone coming along to completely bail them out and they needed to take what they could get and move on. You might find the same kind of situation here. If you're not in need of the equipment immediately, patience and persistence just might pay off for you.