Are you a Switch Online member that regularly plays the NES library? Haven't got a proper wireless NES controller yet? Then you might be interested in the current sale taking place in North America.
Provided you are a Switch Online subscriber, right now you can get a pair of these controllers for just US$34.99 / CA$44.99 instead of the standard price of US$59.99 / $79.99.
These controllers are both wireless and contain rechargeable batteries - with order processing taking 1-2 days. As noted, this sale will end next month on February 2nd - so take up this limited-time offer while you can.