Aliexpress is having a sale on November 11th and a bunch of Everdrive clone cartridges will be 15% off plus you can use a $5 or $7 off coupon that you can get playing a flash game.

Flash Game link
http://activities.aliexpress.com/1111_shopping_festival.php

Super Everdrive will be $49.10 shipped with $7 coupon
Everdrive MD will be $40.90 shipped with $5 coupon
Everdrive N8 will be $65.25 shipped with $7 coupon
Everdrive GB will be $43.45 shipped with $5 coupon

http://www.aliexpress.com/store/927177

I have purchased the Everdrive MD and Everdrive GB and they both work flawlessly but please be aware that these are clone cartridges.  You will never be able to update the firmware on these.