Originally Posted by Poco1220
You could Go get him and make her sign a contract saying if he doesn't pass the vet check you can return him for full refund. But more so sounds like she's trying to avoid the vet check which worries me.
Poco, you can't make
someone sign a contract, especially a seller.
OP, either she really does have another buyer, or as Poco says, she's afraid the horse won't pass the vetting.
Go ahead and call her bluff; tell her you're sorry, but the vetting was scheduled for Monday and you can't change it, so she needs to go ahead and sell the horse to these other people.
If she starts hemming and hawing, you've caught her. Otherwise, it's merely a case of first one there with money gets the horse.