Re: Who has been to a Car auction? They have Boats too.
I think it's good that you have a healthy dose of skepticism... I went with my BIL to a car auction once, he wanted a 4x4 pickup that was on the block. The auction area was set up in an indoors thing where a vehicle was driven through, the auctioneer was elevated, and the buyers were all standing in a crowd. Well once you start bidding on an item, it's fast and furious, and the auctioneer and the "caller" (their helper) is busy talking to you etc etc... Well... as my BIL is bidding and counter bidding, I'm standing beside him and looking around at all the "callers" that are helping the auctioneer... I see one of them standing on his own calling out bids now and then. I grab BIL by the elbow and tell him in his ear to stop bidding (as auctioneer / another caller etc is yelling, chattering to him for the next bid). I tell him again... "just say you're done"... He does so, and the auctioneer then backtracks to find the next highest bidder. Well low and behold there is none. The caller on the side, just gives the auctioneer a sheepish look... oops. They backtracked a few bids (~$500 IIRC) and then gave him the option to buy it at that price or not. BIL asked me what I thought, and my "on the spot" advice to him was that I still doubted that they had a real bidder to get to that price, but nonetheless if he wanted the truck and thought it price was good (which it was) that is was more or less like buying with a reserve bid....
He decided to buy the truck, and ended up having pretty good luck with it (except for being a gas hog).
Bottom line is that it made me even more suspicious of auctions than I was before. I think they are often set up so that the bidders can't get a good look around to see if there is actually another bidder on an item... Just cause someone's stickin' their hand up, doesn't mean they're a bidder. They could be a "caller"/helper whose real job is to drive the prices up to what they judge will still be outbid by someone else. They often seem to setup behind and around the main crowd (so you can't see whose bidding against you). If you're on one side of the crowd, it will probably be a caller on the complete opposite side that drives the price up. Maybe they're not all this way, but this was at one of the big auto auction places here... they definitely have a "home court" advantage.
If you are planning on buying there, I'd suggest know the value of things, and you watch a few auctions first to see how above board they seem. When you're gonna buy, bring along a buddy to serve as an extra set of eyes. This person should understand completely what the game being played is, 'cause you're not gonna have any time to explain it to them on the fly.
As for checking things out before you buy... that's why they're going cheap... you're taking a chance that it has problems... if you can live with that, then there are probably bargains. It's hard to go wrong for $100... but I'd feel ripped if I spent thousands on a rig that turned out to have major issues. I'd rather buy at a private sale where I could talk to the owner, do a water test, and hear some of the maintenance history... but that's just me. If it's a $10K boat that you're getting for $3K, maybe that's worth the risk (?).
Anyway, that's my $.02. Good luck.