Save 10% off at Buy.com with Amazon PayPhrase!

If you pay for your Buy.com purchase through Amazon's PayPhrase, you can get 10% off your purchase!

You can also get 5% off Amazon.com purchases!!

Details:
After each eligible purchase you make, we’ll send you an e-mail to confirm your order. You will also receive an e-mail that includes your PayPhrase CashBack amount, and instructions on how to claim your CashBack Reward, by January 31, 2010.

To claim your CashBack Reward, you will need to have an Amazon Payments account. You can create your account now or when you receive the CashBack Rewards e-mail. Instructions will be included in the e-mail from Amazon Payments.

The maximum amount of CashBack Rewards per qualifying transaction is $50.00 USD. In addition, all CashBack Rewards (including Rewards earned in connection with purchases made at both Amazon.com and participating Checkout by Amazon partner sites) are subject to the maximum per person cap of $250 USD.

Here's the promo page

Here's a list of participating merchants