A lot of this is going to depend on the motor. How many hours, two stroke vs 4 stroke... Go with a 4 stroke if at all possible. Much better on fuel giving you greater range and very quiet.
I have a honda 4 stroke on my RIB/ dinghy and I can sit there talking to people and after about 10 minutes they ask is that motor running? It's that quiet... At idle the loudest part is the water pissing out the back.
Also I would think that price is a component of what features are on it... Live wells, rod storage lockers internal fuel tanks and such... It's always good to know what the cost would be for the same boat new and measure wear and tear against that.
Sounds like a fun toy... Enjoy it when you get it... Take the kids fishing because they'll always remember the time with you.
Be glad your wallet doesn't have to endure the trials of large oceangoing boat ownership... Saltwater seems to disolve money.
Regards,
Chris