Radio Shack: $10.00 Off $40.00 Purchase – Facebook Coupon! November 7, 2010 by Queen Mum Leave a Comment “Like” Radio Shack’s fan page and get a $10.00 off $40.00 qualifying purchase. States each coupon has a unique code that can only be used once. Photocopies will not be accepted. Get your coupon HERE. Coupon expires 11-9-10 so hurry! Thanks Dayna!