Some bestbuys are better about price matching or even following their own policies than others. I've had bestbuy's refuse to pricematch a target across the street. I've had walmarts refuse it as well. This goes for just about any place. It's basically all about who is the manager on duty and how big an ass hole the store manager is.
I've worked long ago at a really bad bestbuy that pulled this kind of shit. Actually this bestbuy got closed down for a reason. If anyone in Colorado Springs remembers the bestbuy off Powers by Peterson AFB, that is one I worked at for a bit that got shutdown.
First off, the store manager refused to do employee discounts for anything there. Employees were not allowed to by clearance or sale items or be fired if found out. They majorily pushed the high margin stuff and basically made most of the sales staff lie their asses off to get those high margin items sold. It was the worst retail place I've worked at. To top it off, the reason I ended up quitting is because I put in a request over a month ahead of time to take a Friday and weekend off for my birthday and when I was having family come from out of state to visit. There was nothing going on that weekend either that required me being there. The manager scheduled me anyhow. When I asked, "what the f?" about being scheduled I was told to either show up for my job or not show up again. He wouldn't even let me switch with someone else. So I quit. On top of that, I never got my final paycheck from them. I had to file suit and the IRS and some other agency went after that one BB. Turns out, the store manager was majorly embezzling money from what was found out and a big lawsuit was filed and won. I ended up getting $1.80 check after it was all over.
As such, I only now shop at bestbuy when they screw up and have a major clearance price on an item.