You know Best Buy's jumped the shark when...
You walk into the store knowing EXACTLY what you want, you go to the section of the store where the product is located, you park your butt in front of the display model of said product, at least four sales associates look you straight in the eye as you try to SIGNAL them with that "Excuse me, but could I get a little HELP over here?" look on your face and after being blatantly ignored you hop on your cell, call information, get the number for Circuit City, call Circuit City to ask if they have the product you want - within earshot of Best Buy sales associates - and they continue to ignore you.
Now for the ultimate irony - when I asked to speak to a manager to complain about the blatant disrespect of their sales associates the first person who ignored me wound up being the MOD at that particular time. I'm pretty sure that, a month later, the man is still trying to find the remains of his nuked gonads.
For the record, I find virtually all electronics stores deplorable and whenever possible my family uses my father's faculty discount at the university from which he is retired to shop at the university's bookstore. We can get pretty much anything we want there that is related to electronics, get a discount and since my father is a Professor Emeritus we get a level of sucking up that even commission-earning employees elsewhere just can't begin to match ;)