It looks good timing belt ,waterpump and other misc items need to be done at the 10 year some of the guys might be able to tell you how much it is going to cost for bargaining purposes. Good luck
to do the maintenance stuff you are probably looking at $600-1k, if it has been done it seems like a fair price, if not that is a negotiation point for sure
if you don't have boat experience hopefully you know someone that does that can look it over for you, 16k is a lot of money for something 10 years old - it is worth it if everything is fine but not if it was neglected
by the way if some of the stitching is falling apart the rest is probably close, unless you know someone that has knowledge to do that work it can get pricey too