I find it strange that they even have these... I wonder if it is some marketing ploy. Maybe they are changing formats? I couldn't say because I have never gone to one. It is a store listed in the "women's fashion" category and there is only one around here. Why would they even have these in stock, but not be online or out on display at a store?
Back on topic, I wouldn't really consider the Retron5 to be a "retro" console (in fact I'm starting to hate that word) because it is just an emulator. It isn't even a clone... Part of me wants to say it is silly to want to play an older console on an HD monitor, but part also can understand. I'm perfectly fine willing to joe8 it on a CRT TV mostly because I'm too cheap to spend the money to go to RGB. The easiest that I know of is for the Genesis where you can spend about $70 (depending on how picky you are about audio) and get it to component without any modding. Finding appropriate CRTs are still fairly easy at thrift stores and you don't have to go crazy to find a pro monitor if you don't want. There's no reason to get wrapped up in some dick measuring contest over how good your graphics look because no one really actually cares.
Another part is that if you really want to play an old console on an HDTV, then bite the bullet and get a Framemeister. You probably paid more than one of those for that fancy TV anyways and the price has been coming down over the years.