DiegoTc:
Forget it.
It was a bit on ebay. FInal Price was 250 $. (It is cheaper than original).I think the best way for doing my project will be using x10.
Or do you know a way how to control the electric outlets using ZigBee?
If you like soldering, you can use wireless boards and relays (mechanics or solid state) to control you electric appliance. We have done somenthing like this using Chibiduino boards, that has a radio in 2.4 GHz like ZigBee, but running over it a simpler stack.
Regards,
Dario.