Re: need help with a price.
It's hard to say for an I/O boat, the motor is more a part of the whole package than is an outboard.
I've got an 18' Starchief with an outboard and there's no way I'd let mine go for $2800, but mine has new decks and a new transom. I paid $2500 for it with a decent trailer, rotted wood everywhere but a solid hull. Mine had a motor that ran, but it was tired and the tilt and trim was shot. I replaced the motor with a more modern outboard. If I were to list mine, It would be as a hull only, I'd keep my motor for the next boat, and most likely the trailer, unless someone gave me what I felt it was worth. Since you can't buy one of these anymore, to me that makes the price even higher. Even a junk aluminum boat is worth its weight in scrap aluminum, which in that case would be around $480 right now.
Mine also needed a complete repaint, which it really still does but I can paint the hull anytime.
If your after an I/O boat, then that boat may have more value to you than it does some others. Myself, I won't touch an I/O model, there's just too much to go wrong and it's too hard to change to a more modern motor.
With an outboard it's just a few bolts and a set of controls.
I passed up a 22' Chieftain that was basically in the same shape as what you describe a few years back, the guy wanted $200, and had no takers. The boat finally got given away. If that were an outboard, around here, people would have been beating down his door to get that boat.
I had thought about taking it and doing an outboard conversion but the cost of doing so and the fact that I really didn't want a 22' boat, I didn't bother. I had no interest in scrapping it either, figuring that someone would buy it and fix it up. I later saw it for sale for $4,000 with a new deck, new cabin wall, and no motor on a modern roller trailer. It sat for a few years but finally disappeared. The guy said he sold it for $2300.
As someone who buys a lot of boats and is always fixing, trading, and selling, I generally only buy boats that are really cheap, I pass on anything that I don't get for almost nothing unless I really like the boat or another isn't likely to come along.
I've bought aluminum boats for as little as $50, and as high as $4500, it all depends on the boat. The most important thing is to find a solid hull, one with no missing rivets, no dents, no corrosion, and not modifications. Paint, plywood, and other parts are cheap and easy to replace.