Do these cards typically find themselves stocked by retailers? I asked if Best Buy would be getting any and they couldn't find it in their system at the time, but I wasn't sure if it was just because they were new.
I would strongly advise against buying a video card at a retailer. The markup, depending on retailer, is typically about 15-25%. On a card that would normally run you about 200-300 dollars, I'll leave you to do the math.
Retail stores also tend to have a very limited selection. People who buy computers from stores tend to not be the type of people who would know what cards are good to buy, and people who are generally knowledgeable about which cards are good buys know to buy them online. Stores might carry a small stock of about half a dozen models, but they're usually either lackluster, overpriced, or both.
Buy one online. Ditto for RAM; that **** is marked up even more because they know it's a lot easier to tell someone who comes in complaining of a slow computer that they "need more RAM" and they can pawn that stuff off on them pretty easily. Bonus if the person pays them to install it.