My Staples deal beats Amazon by a tidy amount

I went looking for Compaq Presario 770 US laptop computers for sale. Amazon will sell you one for $609.99 before the rebate. The mail-in rebate reduces the price to $579.99. I paid 479.99 at Staples and have a further $30 rebate to mail in. That deal is only good through today, apparently, "in-store".