Everything that needs to be fixed or replaced should be totted up. That final amount, you will take off their asking
price. I hope the chain is in good nick, better figure on re-galvanizing it. Check the anchors, too, it is usually cost effective to do them at the same time as the chain.
Expect the life raft not to be serviceable any more.
The
survey can also give you an idea of an accurate valuation of the boat. If you go see her and she feels good, that is a good sign, but look carefully for
water damage, 'cause you don't know how long the
ports were leaking, nor when the others were re-bedded. If there is carpet, look under it to ascertain the condition of the timber underlayment.
See if you can find out what others of the size and vintage have
sold for, because it'll give you an idea how low an offer will be too low.
Incidentally, there are archived threads about how to survey a boat, called something like Surveying 101, use the CF
Google Custom Search under the Search menu.
Ann