Micro Controller Board, MACTISICAL 10Pack Upgraded Mini USB Nano V3.0 ATMEGA328P 5V 16M Micro Controller Board Module for Arduino (10 Pack, Nano V3.0 ATMEGA328P Module)

Can't beat the price. I've used 4 of the 10 so far and they've all worked as expected. These are so nice for projects!

These days I don't use Arduinos as much, but sometimes their ease of use is difficult to ignore. These are serviceable Nano clones using a CH340G for USB comms (because we can't install too many USB drivers amiright) and work just fine.

I've used 2 without issue. You will need to download drivers for the WCH CH340C USB chip which is different from the standard Nano. Once these are installed it works with the Arduino IDE just fine.