Bank foreclosures appear to share many characteristics with tax foreclosures (aka tax liens). And yes, Mr. Gump is wise.
To date, I have 'bought' and received title to 3 pieces of tax lien property. I have also bought post-foreclosure houses, but those are more of a known entity buying through a HUD agent where tours are available.
One of the issues I've found is with smaller, cheaper properties: there are often city special tax assessments against them because the owners failed to comply with health/sanitary regulations. Mowing lawns, dumping trash, etc. This can also impact "nice" houses as I found one of these for sale on the 2017 auction...nice looking on the outside except the roof looked shot. Came to find out later from a guy at the auction who knew the neighbor of the owner, indeed the roof was shot, and the owner was living in the basement. Literally, the house's main level "floor" is now his roof while the water just pours into the upstairs during rain storms. The property is maybe 25-30 years old. Nice middle class hood of other 3/2/2 brick houses with well kept yards and good school. Owner went nuts, we think. There are close to $7,000 in city liens against it for yard care and dangerous structure citations (large shed in back was falling down and was demo'd by city). And it's still on the City nuisance list, so more charges are piling on.
It could be a disaster if the owner wakes up one day and decides to douse the place in kerosene and put a match to it...poof. No more value.
The "winner" at the tax auction bid it up to $45,000 or so. In "as is" condition, I estimate the house and lot together are worth $80,000 - $90,000. Comps in the hood are selling for $120K-$130K. If it gets burned...maybe $20,000 for the lot after demo/cleanup costs. The winning bidder won't know for sure what he'd got until the redemption period expires in August 2018.
So all that to say is...you're right. You don't know what you're gonna get. Hopefully, you bought it cheap enough. I think I'm done bidding on cheap properties after this year. It just costs too much and too many unknowns.
--173.19.xx.xxx