MacMinute reader Tony Strong passed along a note to let us know that while visiting a CompUSA in Naperville, IL, he noticed that the retailer is offering a 5% instant savings on all Apple desktops and notebooks systems. He also pointed out that the company is offering 24 months of interest free financing on any purchase over US$799 and if purchasers sign-up for a CompUSA credit card. The sale appears to end Saturday, August 5th.