Actually you will spend $5 shipping (reduces to $4 if you buy two). You get an Allwinner H3 chip (with quad core ARM) along with 256M of ram and a 10/100 ethernet. Kick in an extra $2 and get 512M of ram. Add another $3 to get a heat sink. And you will get nowhere without a micro-SD card, so add $8 for one of those, so all told a working 512M unit with heat sink will run you $25. Don't forget you will also need a power supply and some kind of USB to serial gadet.
I ordered two with 512M and heat sink on 6/1/2017. The order was $17 each, adding in the shipping. I will tell you more when they arrive. They arrived 6/13/2017 and look just fine.
The schematic indicates that the Pwr LED is red and is connected to GPIO-L10, however my unit lights up faintly green when powered up and attempts to blink this LED have no effect.
The status LED is blue (says the schematic) and is connected to GPIO-A10. It is indeed bright blue, and can be controlled via GPIO-A10, just as the schematic indicates.
All indications are that the unit expects to receive 5 volt power via the micro USB, but the startup notes declare that 5 volts at 2 amps "is a must", so it isn't going to do to just plug it into any old USB port (limited to 0.5 amps).
What I did is to connect 5 volt power to pins on the IO headers. This works, but I see odd behavior when I have a USB to serial gadget attached. The USB to serial device partially powers the NanoPi in an unstable way via the Rx and Tx signals when regular 5 volt power is off.
It looks like there are any number of handy places to connect 5 volt power and ground on these headers in lieu of bringing it in through the USB connector.
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