Well, you just got yourself a boat - I presume in order to enjoy it. Why worry about resale already, since it's new for you? This boat, like any other boat of that caliber, will cost you money in the long term.... gas, repairs, safety gear and electronics, fishing stuff... the list is endless. And its resale value will slowly drop, just due to its age.
If painted, when you decide to sell you may lose a bit of money - but I'd imagine much less than the amount you'll have spent to enjoy it!
If you want to keep it in the water, do not worry any more and just do a proper job (do not forget the sealing underlayer - not sure what it's called)!!!
Happy and safe boating!