Bottom line, P, you just weren't talking his language. He's trying to feed his family and you need to appeal to THAT side of him. You need to:
Promise you won't sell any locally.. ebay them. If you're fixing them and selling them in town, you're his competition.
Make him an offer. Pay him $10 per saw, $25 for huskies and Stihls.. or something similar....negotiate. If you make him a legitimate business proposition that works for him too, he'll listen. If he doesn't bite.... he's an idiot or he really ISN'T listening. There's usually something you can do about the second case.
It IS a waste, but he's trying to make sure he stays gainfully employed. Just make it so there's a financial advantage for him in providing you saws.
You might even try walking in there and say something like, "I have a chainsaw collection...... I'd like to make it worth your while to sell me some chainsaws... what would you say about 25$/saw?" It would relieve him of his worry that you're the competition, you're asking HIM to think of a way that he might sell you some, and as soon as he knows you want to PAY for them, it's a whole new ballgame.
If you don't want to pay... well, you're never going to motivate him. When you get something for nothing, it's a crappy deal for him. Remember, it's HIS resource. He can do whatever he want's with it... which, if you do your part, could include selling it to you!