I had problems getting one Sunday night...it rang up $27 at the register, the guy told me that the shelf price of 19.99 was after rebate. Strange, 27 - 10 isn't 19.99... Anyhow, I went back Monday night, it again rang up $27, so I told the lady it was 19.99 on the shelf. She went back and looked, came back with the shelf price in hand and I walked out with it for 19.99. I'm led to believe that it was simply a pricing error, like maybe they hadn't compenstated for the rebate, as half the optical wheel mice had no rebate on them. A side note, I checked a seperate CompUSA earlier Sunday, it was $24.99 with a 10 MIR, rather than the $19.99.