Why not consider the brushless Thunder Tiger Phoenix XB? It is in essence an Ass B3 Stealth.
http://www.tiger.com.tw/product/6572-F.html
Here in Sweden, it retails for less than 225 £, which is quite a lot of car for that price.
Otherwise, get a used Ass B4FT, they are not that expensive.
By the way, is the X-6 really that common in the UK?