Talk of the devil. I was only asking Dan about his frex wheel adaptor this morning.
If i had the option to buy one for £45 i would snap it right up, i'd pay that just for the adaptor

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Even if there is wear you can always replace some parts, whats most likley to be worn out after that many miles? buttons, maybe the steering pot/encoder, whatever is in there. Both those things are very cheap and easy to replace.
Just open it up when you get it and give the gears a good greasing and it should be fine.