Hi David,
Obviously she will now be between 24 and 29 years old, so all the usual things to look out for on a boat of that age - how old is the engine, how old are the sails and rigging? How old are the electronics, how well have updated electronics been installed, was the shorepower an original fit or subsequent "improvement" and if so, how well was it fitted?
Thinking more specifically Moody of that era: What do her keel studs and nuts look like in the bilge. Have any keel studs ever been drawn? How much rust is there at the keel to hull joint?
When did the owner last lift and reseal the little sealing plates around the shroud chainplates, when were the chainplates and the part bulkheads to which they are bolted last inspected? If these two questions draw a blank response, put a 12" steel rule (or some other straight edge) along the deck next to each shroud, if the deck is showing signs of bulging, dig further.
Is there any cracking around the plinths on which the genoa sheet turning blocks are mounted?
Has the teak faced ply in the cockpit been replaced with solid teak?
What is the condition of the mild steel fuel tank and of the aluminium (I think) water tanks? Has a holding tank been installed (and if so, how well?
If the hull is sound, none of these is unfixable, but if everything is old and has not been replaced in a timely fashion, the bill for bringing her to A1 condition is likely to be more than the price you pay for her
The golden rule with boats over 20 years old is that their condition says more about the way they've been looked after that the way they were built. Marine Projects are sound builders, so Moodys started off as good boats so imho worth looking after well, but they don't always get the care they should.
Happy hunting.
Peter.