Amazon has a Family Blu-ray 3-pack containing Alvin and the Chipmunks, Ice Age & Ice Age 2 for only $19.99! (Reg. $49.99) That works out to be only $6.66 per movie.
Shipping is free with orders totalling $25 or more. Or, if you are an Amazon Moms Program Member or a Amazon Student Program Member, your order will ship FREE with 2-Day Shipping.
(Thanks Swaggrabber)