Yes Microcenter is legit. They even had a sale last week for an i5-3570k for $100! IT SOLD OUT in no time
And that is the main problem with them -- they advertise a sale on an item they are short stock on and it runs out within a couple minutes\hours yet they advertise it for several weeks to try and lure people into the store and sell them something else --- I'd rather they sell the CPU for a few $'s more and actually have enough stock to have it when I get to the store !! (Note : some locations are better than others but still a problem company wide) -- The only ones that actually get it for the advertised price in most cases are those that know a sales rep that will actually put one aside for them.