Trend Micro Titanium Maximum Security 2013 (3 Users) Free After Mail-In Rebate
Newegg has Trend Micro Titanium Maximum Security 2013 for 3 users (this is the best of the three anti-virus software offered by Trend Micro for home PCs) priced at $60 and there is a $60 mail-in rebate for a Visa gift card from Trend Micro, making it free after rebate!
(Newegg only charges tax in California, New Jersey, and Tennessee).