The Wowcher Drone is a Syma, so almost as cheap from your source!
Heres an alternative source
http://www.gearbest.com/rc-quadcopters/pp_73260.html
you can often get discount codes for gearbest and banggood
theres lots of youtube videos about the X5C-1
to translate the product codes
the drones with -1 on the end are a second version
if they have W in the code the cameras do wireless streaming of FPV to a phone/tablet
the ones with S in are an improved model with longer legs usually, better battery life etc
The G has a gopro type camera mount and cheap camera I believe but has only just come out
difference between 5 and 8 series is power and size.