I'd be sure to check any cored areas for water intrusion.
As for deformation, look for any ripples or dents that shouldn't be there, As Delirious said, being on a cradle is a lot better than sitting on jacks.
Can you get a sailplan for it? or is it a common enough boat that you can contact other owners to get specs and rig from there?
Sounds like a great opportunity to build the boat you want, I for one have never been happy with off the shelf boats, there's always a few things that I don't like about the layout so end up tearing things out and rebuilding. That boat puts you at the blank canvas stage, you can build it for your comfort and convenience.
Only other advice is to keep the purchase price down, sailboats without sails and mast are like powerboats without the engine, kinda hard to sell