You may have heard of the A6, the Gsm/Gprs module made by Ai-Thinker, they also made the A6C, it's the A6 with a 0.3M camera, and the A7 which is A6+GPS. Now i discovered in a chinese doc the new incoming A20 which combine A6+Camera+Esp8266(the Esp8285)!
For the price i think it will be around 15$ even less, because the A6C cost 12$ atm.
I think it will be the cheapest ready-to-use esp8285 camera, and if we can control the gsm/gprs module with the esp8266 it will be really nice.
You can have more info here about the A20: https://raymondtunning.wordpress.com/20 ... m-product/
Also for the A6C here: https://raymondtunning.wordpress.com/20 ... ution-a6c/