First, Paul - the galley up 501 makes the saloon so small that it can't seat all of the people that it will sleep. IMHO not a good thing.
As far as values, here is my own recent experience. Since May 1st 2015:
We sold a 1979 53 Classic for $200,000. with a few repairs done by the seller but no price adjustment. Ask was $238,500. This was a shed kept, Naiad stabilized boat with healthy power, decent paint, updated galley and a beautiful new interior. She had been twin berths and was retrofit with an athwart-ships queen.
We also sold the nicest we have seen in while 53 ED 1985 for $248,000. Ask was $299K and the seller gave $5,000. after survey. Final selling price $243,000.
We sold a 1970 and 1973 both 53 Classics. Ask on both was $129,500. They sold (within 90 days) for $123,000. and $110,500. respectively. Both were decent, but had considerable survey findings. That's still a whole lot of handsome, live able boat for that $$.