Through 5/12, get this Symantec Norton Antivirus 2013 for three PCs for free when you send in this $45 Mail-in Rebate. Plus, you'll get a 8GB USB flash drive for free at checkout, a $8 value. With free shipping, this is the lowest price we could find on the software alone by $22. Choose to have the software shipped to you or download it for the same price. The rebate form must be postmarked within 30 days of your purchase date. There is no sales tax (except in CA, NJ, TN).