First reply can have it.  It's $10 off a purchase of a single item of $50 or more using a MasterCard Debit Card, and it's only good until Sunday.

They emailed me, but I have no use for it.

Fine print:

To qualify for the discount, MasterCard Debit Card must be used on a single item purchase of $50 or greater. Coupon excludes the following: Home Theater: Bose® audio products; Polk Audio; Denon; Boston Acoustics; Sony televisions, audio & Blu-ray players; Magnolia Home Theater® products: Bowers & Wilkins, MartinLogan, McIntosh, NuVision, Sonos and SpeakerCraft Audio merchandise, Control4 merchandise and special order merchandise; Musical Instruments: Fender, Squier, Boss, Rolland, Epiphone, Gibson; Portable Electronics: Apple® iPods® and Bose products; Digital Imaging: Sony WX10, TX10, TX100, TX55, HX7, HX9, HX100 and Sony NEX-3 cameras; Sony D-SLR cameras, lenses and flashes: Sony camcorders; GoPro cameras; Nikon D-SLR cameras, lenses and flashes; Phones: No Contract phones, broadband and airtime cards on all carriers, no contract airtime cards; Gaming Hardware; Pacific Sales products; Geek Squad®: C.O.D. Geek Squad services. Not valid on any BestBuy.com order, including store pickup. Best Buy employees are not eligible for this promotion. No dealers. No copies. No cash back. No cash value. Coupon must be presented at time of purchase.