"It is the most compact motorised folding bicycle i have ever seen, this surley will be of some broad intrest. "

You might be suprised at the lack of interest. Indeed, some police officers might feel that it's a non-roadworthy, uninsurable death-trap which would leave the rider open to prosecution if they rode it on the road.

Whack it on Ebay. You'll have an absolutely firm indication of value within 7 days. Someone in the USA might buy it.

Oh, yeah:

"Any road vehicle in the UK fitted with an internal combustion engine (petrol or diesel) must be registered and the user must have a licence, tax, insurance etc. and wear an approved helmet. This includes motorised bicycles."

Things might be different in Wales, but you're not going to see that put-putting around Richmond Park in London.