I have bought a Raspberry pi in landzo online store,it is likely that store is a new store ,so that it is cheaper than other store,I recommend it for you ,if you have cheaper goods,please recommend it for me ,too.
www.landzo.com
http://www.aliexpress.com
Massive choice and VERY cheap but you have to wait about 2-3 weeks for delivery depending on your location😎
I confirm that Aliexpress is really a good on line shop but, for my location (Italy), I usually wait around 5-6 weeks. Anyway …