Or, give it to someone who can't afford a horse but really needs one, because it will be worth more to them than to someone who can afford to overpay for it.
Would they be able to afford to care for the horse? Do they need it because they need a workhorse? It’s more of a gamble and if you’re trying to get best odds for the horse you’d probably skew towards someone that’s paying a large sum and not based on their human necessity
