Jelly Comb via Amazon offers its
Jelly Comb Game Controller for NES Classic for $10.99. Redeem the 45% off coupon on the product page to drop the price to
$6.04. Plus, Prime members receive
free shipping. That's $21 off and the lowest price we could find. It features a 10-foot cord and is compatible with Wii U and the NES Classic Edition gaming system.