Verizon Wireless is offering the Moga Pro Wireless Gaming Controller for Android for $9.99 shipped. That's $70 off the original list price, $31 less than Amazon's current listing and the lowest we can find.
The Moga Pro has a full-sized console-style design and you can charge your phone while you play with its rechargeable 2,200mAh battery. It also features dual clickable analog sticks, shoulder buttons and triggers, a D-pad, and four action buttons. You can use it with Android 2/3/+ devices and Amazon shoppers gave it 4.1/5 stars.
You may also want to check out the $100 Google Play gift card for under $80 shipped.