Even though the CompUSA rebate is good until the 14th, they've raised their price online to $209.99 (don't know if this is in b&m). This is kind of interesting considering they sell the Maxtor 45Gig for $169.99.
Pulled this from the Amex Blue site regarding price protection.
<< You?re assured the lowest price available on a covered item purchased entirely with an eligible American Express Card in the U.S. If, within 60 days of your purchase, you see the identical item in a printed, dated advertisement at a lower price than you originally paid, American Express will refund the price difference to you, up to $250 per item. Refunds are limited to $1,000 annually per Card account. For more details or to file a request for a refund, call 1-800-557-8317. >>