He doesnt tend to run that high - if I could get that price for my Thundercloud he would be up for sale tonight
A nice one with minimal issues including some head/body mismatch would be $70, age marks devalue him from there but not dramatically as he is super hard to find without age marks. A minty one with no head/body mismatch then $90-100 because he is so hard to find.
However £6.50 is an amazing price - no matter his condition!
He would have to be missing 2 legs, all his hair, be drawn over with permanent marker for that not to be a good price!