If you can go to the farm, look at the animals they are selling, test-ride (if the horse is already backed/trained for riding), get a pre-purchase exam, etc. that's your best option.
I'd never buy a horse, sight-unseen, based on what the seller determined would be "best" for me. Certainly wouldn't have it shipped to me until I'd seen it with my own eyes.
And Walkers may not be as common in that part of the country as in others, so some sellers may take advantage of that fact and try to sell at higher prices.
A guy I know used to go to Arizona every year (he lives in Indiana) with a couple of nice, well-trained and seasoned gaited trail horses he had in training. . .because people there would pay double or triple what he could sell them for in the midwest. Not show horses. . .just pleasure/trail. . .but people with the $$$ were willing to spend it.
"Parelli horsemanship is just like painting by the numbers. You need absolutely no skill. You just put this color here and this color there, and when you're done, you have ... a mess no one wants." mp