Anyone know anythinga bout dealer car auctions?

My uncle and I are going to a dealer auction. i thought it was a great idea to go, but the more I read about them, the more I see that there are low end, clunker cars, and you can’t buy them cheap. Anyone know or been to one and could maybe tell me what kind of cars I would expect to see there? Thanks
And I know that you have to be a dealer to go to a dealer auction but we’ve gotten around this.