Always, 100% of the time, do a title search before you bid.

If you paid the full amount already, you most likely cannot back out of the deal, would take an attorney and legal work to attempt to.

As far as which liens, it depends on the lien, type of lien, type of auction you purchased and which lien foreclosed.

If you want to become a successful foreclosure auction investor, and skip the typical first year where most investor lose money or don't make any, take our 1-on-1 county foreclosure auction course. It's an upfront investment which will pay off on your first deal and then some!