Five Nokia smartphones available now with $50 mail-in rebate

Nokia USA is now offering five of its smartphones with $50 mail-in rebate, which will provide you with a $50 Nokia Visa Prepaid Card. These handsets are the 5800 XpressMusic ($339), the side-sliding E75 ($440), E63 ($229), N85 (385) and N79 ($309). How do you find this new deal?