This deal has ended.
newegg.com drops the Kaspersky Internet Security 2011 3-User for Windows, model no. KIS1103121, from $79.99 to $50. Better yet, this $50 mail-in rebate cuts it to $0. With free shipping, that's the lowest total price by $31. Note that the rebate must be sent back and post marked by 8/31. Sales tax is only charged in CA, NJ, and TN.