There are lots of things that can make properties more difficult to sell. We have taken over many places others couldn't and sold them so if you want to send me specifics I can give you a more intelligent response.
Lance R. King
King Realty Group
License # 01384425
"Troubled" property sounds different than "Distressed" property:
Why are you being so cryptic?
If it is distressed, then drag a contractor along with you and have him compile an estimate.
If the problem is Liens, Encroachments, Title, Surveys and the like, then befriend your Escrow Officer and pick her brain.
In either case; get a Realtor to help you.