Hi Sue,
This is a new one on me. They might have great garters and be a wonderful company, but I see some warning signs. I did a search for the keyword "garter" on their website and found the following:

They're calling a checkered garter snake that's heterozygous for albinism a "T. sauritus," and they're selling it for less than their normal checkered garter, which they simply call "Thamnophis sp." Whether it's het for albinism or not, a checkered garter is a T. marcianus.

They list a "Northern garter snake" as T. sirtalis, and they have two separate prices for it ($24.99 and $27.99)? Maybe they're selling a "common garter snake," but who knows?

They're also advertising an "Oregon garter snake" as T. sirtalis and selling it for $52.99. I suspect they're selling "Oregon red-spotted garters," which are T.s. concinnus because Oregon garter snakes (T. atratus hydrophilus) are rare in collections and would probably be more expensive.

Again, they might provide nice healthy snakes, and they might be learning the nomenclature; but there are some warning signs here. It's a good thing you're checking them out. You'd have to request pictures of the actual snakes for sale to know what you'd actually receive. Ask Kitkat about ordering one subspecies/morph (flame) from a breeder and getting another (fitchi, as I recall).

Rick