it is my understanding that yes, the buyer is responsible for all liens. Unpaid property tax, HOA dues and fines, even contractor liens that may be tied to the house. I believe that it is possible to find out about any recorded liens by checking at the county recorders office, but there may be unrecorded liens. And of course, any repairs are your responsibility, and there are no disclosures. If the foreclosure auction is at the county courthouse, you will have to pay with all cash - no loans are accepted there. Caveat emptor! these are not really for beginners, but you can certainly learn something by attending an auction.