Attached to the listing is a document from the city of Sacramento, stating that there is an active permit for repairs on the property, that it is vacant and must be maintained , etc. Etc.
If you are serious about this property, I can give you a copy of the notice from the City and I'm sure we could contact the sellers to see if they'd still be interested in an offer. I think that, if you have the talent, a property for $50K might be a good deal. I might think the lot alone might be worth that....to the right buyer.