Where is the cheap wireless module?

I want to make a new design which need 2.4G and 915M wireless module. Pls help to tell me where I can buy the cheapest modules, for the quantity is about 10k/month if the proejct is success.

Maybe you can buy it from our website www.mcurf.com

30M Distant's 2.4G wireless transceiver module WM2500S is only sell 1.5USD for 5k.
200M distant's 433M wireless Trnasmitter module WM4221 is only sell 1.1 USD for 5k.
200M distant's433M wireless receiver module Wm4320 is only sell 1.2 USD for 5k

You can visit the www.mcurf.com/html/Producte.html know more SPEC

We also provide customer the free software support to customer. The software is base on 51 chips.

The www.mcurf.com 's website had been updated , Welcome to visit it. 2.4G UART Wireless module with 200m distant and 57600 data rate will be actived soon.