AC4H has agreements with the kill buyers/brokers to resale some of the horses they buy. The broker buys the horse at auction for $300 and tells AC4H to resell it by such and such a date for a price the broker sets (usually around 4 times what he paid)or he ships them off to Canada or Mexico. I suspect these brokers have such a good deal going with their blackmail sales with AC4H that very few of these horses will ever see a killing floor, they are not going to get him $1200 for meat.
These ads are emotional blackmail and IMO, I wouldn't deal with any of these people. For the prices they are asking for these horses that have no history, you can buy a pretty decent horse from a local breeder and not have to pay shipping.