Another method is directly from the buyer's to the seller's bank - wire transfer. The buyer will need seller's account info, such as bank name and address, account holder's name, account number and routing code. It might cost $20 for the service, but it's fairly quick - about 7 days.
There will almost certainly be import duty levied on a bike entering the US, but the buyer will not have to pay the 17.5% VAT (UK sales tax) if the purchase is from a dealer. UK prices shown in stores include VAT (value added tax).
I can't imagine why someone would want to buy from the UK at the present exchange rate of close to $2 per pound sterling. The bank exchange rate is about 1.93, but the average person would pay more.
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