E-commerce Web site Buy.com is offering the BlackBerry 7100g for a price-after-rebate of $24.99.

Here's what's involved:

Along with your order, you sign up for a two-year, Cingular Wireless plan. When your BlackBerry 7100g arrives, you get two rebate forms included with your shipment: 

A $75 "Customer Appreciation Rebate" from Buy.com, as well as a $150 "Voice and Data Mail-In Rebate."

But don't go sending in those rebate forms right away. Lots of fine print is involved.

To get the $150 rebate, you'll need to provide a copy of your third wireless bill showing that your plan is active and that you have paid your balance in full with no previous balance carried over.

The $75 back takes longer. After 180 days have passed since your order, you'll need to send in the rebate with copies of your sales receipt, guide to wireless service, a copy of the UPC from the product packaging, and a copy of a wireless bill for this account dated between 150 days and 210 days after activation showing the previous balance paid in full.