if the boat was in near perfect shape, all original, and rot free, at most $1500.
however because the motor has no parts support, and the probability of the transom, stringers and deck to be in need of replacement is well over the 95% mark, it has zero value.
if it was a long-lost family boat that has significant emotional ties, It may be worth $2k to buy to restore, knowing that a good $2-3k are going to be dumped into the hull alone, and the motor will be replaced for an additional pile of cash.
so do answer your original question. no, its not worth $6k, or even your $3k