$1000 to $1500 for a complete H16 in decent condition, with trailer, is reasonable. It'd be great if you can get a catsailor to look at any potential purchase with you. If not, ask the seller to completely set the boat up with you, that should bring to light anything missing. Replacing missing parts runs up the price very quickly. I'd hold out for a boat without soft spots unless you're experienced with fiberglass work, or very handy.