Used boats have cost me a small fortune, even after I had them surveyed and inspected.Whatever you get I would not buy used. Boats can be a pain in the butt when they aren't working right and buying someone else’s problem just invites trouble.
Personally, is stay away from Mercury engines. I've towed more of them back to the launch than I can remember.
Something with a live well would be nice and make sure the storage is long enough to hold your rods, many aren't.
Btw. I have a great boat for sale!!