Re: 206 Monterey
Well, IF the deck had to be replaced then something went wrong! You NEED to find out much more about this beforetalking yourself into this one. Stringer work means tearing out the entire interior of the boat, then the floor, then all the support below, foam, etc. It;s a TON of work and thousands of dollars unless you do the work then it's 100's of hours. MANY here have done it and many would never undertake it again (me included) even for a "good deal" on a boat.
Normally though, a boat that is in great appearing condition WAS well kept - unless it's not original seats, etc. You need to ask exactly what the deck replace/repair entailed! Stringers? Foam? Engine mounts? Transom? nad also why it needed replacing. MAYBE the boat sunk of was swamped and left full of water. Something happened other than indoor/covered storage.
As far as hp goes, the seller should know, it should be marked on the engine and if you tell us if it's a carbed or fuel injected engine someone here will know about what the hp is (assuming it IS a 5.0L engine). That boat needs at least the 5.0L Id say.
Good luck on your test ride. I just want to reiterate though MAKE SURE if it has had extensive structural repairs they were done right! If not, you're in for serious headaches down the line.