Well, actually guys - the i5-3570k deal is actually very recent (May 16 approximately). It used to be $189.99 at Microcenter but they lowered the price to $169.99 around May 16.
Also, in February I think it was "BYOC Month" (Build Your Own Computer Month) and so therefore they were selling the i5-3570k for $169.99.
However, in March the price went back up to $189.99.
I'm pretty sure that they are going to raise the price again, back to $189.99 - So I would get one before price goes up again