In my experience, its usually the current owner that would schedule a vet check, but if you have a vet you prefer, you can ask that they be used. It's kind of a sellers responsibility, much like selling a house; if it doesn't pass inspection, the owner pays for fixing it so the buyer can buy it. 
If they really really want to sell, they'll offer it anyway, but some of the older stock horses may not really be worth the cost of a vet check. It's a "buyer beware" case if that's what the seller and buyer decide.

If they really really want to sell, they'll offer it anyway, but some of the older stock horses may not really be worth the cost of a vet check. It's a "buyer beware" case if that's what the seller and buyer decide.
