If you don't mind having a somewhat larger quadrotor, consider getting something like Attop Intruder [0] and replacing its PCB with a Flymaple-A [1]. At $120 a

If you don't mind having a somewhat larger quadrotor, consider getting something like Attop Intruder [0] and replacing its PCB with a Flymaple-A [1]. At $120 and some soldering, this gives you 18 minutes flight time and >50g payload. Flymaple seems to be rather close to Crazyflie hardware-wise. [0] http://www.walkera-parts.com/shop/m74/ATTOP-TOYS/p14245/ATTOP-TOYS-(AT-9806)-Intruder-4CH-UFO-RTF-2.4GHz/product_info.html http://www.walkera-parts.com/shop/m74/ATTOP-TOYS/p14245/ATTO... [1] http://www.dfrobot.com/index.php?route=product/product&product_id=739 http://www.dfrobot.com/index.php?route=product/product&p...