I've shopped PPL but have not bought from them. You negotiate with PPL as the broker, they work with owner. Prices are negotiable. When I talked with them, there is the asking price (listed) and owner has given them the lowest OBO price so negotiation can go quicker. If you ask lower, they can go back to owner to check.
Pictures can be a bit deceiving. What may look really good may not be in such a good shape, so always good to actually see it in person, which would be a rather long trip from DC. In the end, you may find something just as good but much closer.