Bingo. LOL.
It isn't a 'symple' question at all.
Is it a static prop? A model? A full sized, working replica? If it works, are we talking 5mph top speed with no suspension, something which can be ridden in a parking lot or at a bike show but that's all? Or can it be taken down the freeway at 110mph, on a full license, safely?
For a static prop in fibreglass, maybe with real tyres, and with enough steel framing to make it safe to sit on, I'd expect to pay at least several grand, in kit form.