Cheap arduino alternative based on the Cortex M0

This is for all the tinkers out there that also enjoy electronics. I found this gem on ebay for $2.00 each with free delivery!

http://www.ebay.com/itm/Arduino-Shields-pin-compatible-50-MHz-ARM-controller/142343588082?_trksid=p2045573.c100033.m2042&_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D41376%26meid%3Dc1bd7e6a7c75419c8d019bb374d67dc5%26pid%3D100033%26rk%3D1%26rkt%3D3%26sd%3D142343588082

When it came, it is actually from the manufacture and all the support can be found here;
http://www.coridiumcorp.com/prod-specs4.html
The site says that they are selling them for $19.95

Anyway, just received them and starting to play with it. Great if you like this stuff!