[old Chevy guy]

You said he had offers, is he actively trying to sell it? You said he thinks it's worth twice what he was offered that would be 16 k. That's just ridiculous if that's what he's thinking. As far as sitting being inside you will probably be surprised at how little you might have to do to get it going. Was it running and driving when he bought it? Offer him a lower price $4000 maybe but only because of the attachment if he says no let him sit on it awhile then go up $500 and wait again if the answer is no then repeat the process but don't break the bank ,sentimental or not. If he doesn't want to sell it anyway it's not going anywhere. And if he does want to sell it chances are he won't get a much better offer either. Don't let him think your desperate but ask him to let you know if he gets a better offer so you can try and match it. A legit confirmable better offer. I'm not sure I believe the site unseen $8000 offer. At any rate nobody with brains would send a check and have it shipped without having someone look at it first.