R2B2 Buys via Amazon offers Prime members the
Moga Wireless Gaming Controller for Android for
$6.37 with
free shipping. (Non-members can spend $35 or more to qualify for
free shipping; otherwise, shipping costs $4.98.) That's $4 under our mention from November and the lowest total price we've seen. (It's also a current low by $5.) It features the Moga pivot app, arm attachment, and is compatible with select mobile phones and tablets. Two AAA batteries are required (not included).