As a buyer, my trainer or myself look at a listed price and decide whether or not the horse is worth what's being listed. I've never heard of people coming to a breeder with a checklist and a budget--interesting~
The check list is just in place, before they go looking for a horse, from whatever source
I wrote about this interesting example before, that gives the gist of that.
A non pro, riding with a trainer, decided to attend a select sale , some distance away. Before he went, he and the trainer went over what he was in the market for
A gelding, well broke, with some proven show record.
That person came back with a two year old stallion, just halter broke, because the horse 'caught his eye!
Lucky he was with a trainer,as a vet appt and lots of training fees might get him the horse he started out to buy in a few years!