Yep there are some shady things that go on at auctions. I have seen "plants" in the crowd that bid against you to drive up the prices. Pretty fishy when the other guys you are bidding against drop out and suddenly someone else jumps in and takes it up another $2000. I jumped out at that point at let him have it. The next auction I saw the exact same truck for sale in the auction and buddy bidding on it again.
My sister bought her Grand Cherokee there. Unfortunatly I wasn't with her. When she got it home she asked me to look at it as it felt like the tranny was slipping off the line. Turned out it was missing the front driveshaft and the si8pping was from the AWD(np249) t-case slipping then locking up.
Bought a new shaft and put it on and found out why it was off. The gears in the front diff were toast. So we got a new axle from Jeep Stuff and installed it, got the diff with the same gear ratio as the old one. After installing the new one the front diff banged when driving it. After checking everything 10 times I found the problem, front and rear gear ratios were mismatched, 3.73 front and 3.55 rear. Had I known BEFORE replacing the diff I would have got a ratio to match the back but it was too late, it was already installed.
Fortunatly in my pile of crap I just happened to have a set of D35 3,73 gears. Thatwas the most difficult gear setup I've ever done and it still has a drone on the highway.
That thing was such a pain in the arse... I get steamed just thinking about it.