Mechanically inclined?
From the sounds of the posting, you don't seem to have a lot of mechanical skills. I don't mean this in a bad way, it's just the way you make it sound in your posts, "pto thingy"...
The ski is all but worthless with no engine. Depending on the skis condition and how the engine compartment looks, you might hold out for a bit more money. It does seem that you've had a couple people look at it and in it's present condition, think they are going to get a steal.
You want it out of the driveway. To the person your talking to, it probably shows that. Even more reason to take advantage of your dilemma.
If the ski is in good shape and you want to get what it's worth, you have to either get it running yourself and sell it with confidence or give it away.
A shop is going to see you coming and before it's all over, you'll be paying someone to haul it out for you.
These replies to your query seem very logical. I think I'd listen and see what you can do for yourself. Have some confidence. You might surprise yourself.
Oh, when you get it running, chances are, it's not going to run really good because it's a DI motor. Sitting for 5 years, I'm sure it's gonna have other issues beside the locked shaft.
What have you got to lose. I think I'd take the plugs out and spray it with PB Blaster.........I'm sold on that stuff now. KustomKarl introduced me to it a few months back and I'm amazed at the results. I had a friend bring me over an Artic Cat that sank last year. The engine was locked up. I sprayed that stuff in there and within 12 hours, the crank was working its way loose. Now, it starts and runs, but I'm rebuilding the carbs........dont' even want to tell you how much trash was in it. There was no strainer basket in it!....