Well, if your keyboard is hotswappable and you have any spare switches, it could be a quick fix as long as you know which switches/keys are chattering and you have leftovers. I don’t know who (Mass)drop had actually manufacture the Halo Clear switches, it could be Gateron, but I don’t think they made that information public.
As someone that shopped at both, but preferred Circuit City, I think Best Buy initially did a better job of “wowing” customers and had a better store layout. They also were better at trying to squeeze money out of people and thus were more profitable than Circuit City, so when times got leaner they survived and then had the whole market.