If you Google 'A-bike', this online shop comes top of the list.
www.yourgym.eu sells knock-off A-bikes called Mini-Bikes, probably from China for £99 and the shop is somewhat amateurish to say the least.
I regretted buying the bike as soon as I'd paid for it (by Paypal) as I didn't receive an email of confirmation from the shop.
After a few emails to them, I received a reply saying the bike had shipped.
Even though the bike looked pretty good, I could tell it was a copy as some of the moulding was a bit rough. It hadn't been assembled properly (the brake cables where on wrong and the chain tensioner was out of position).
The shop had a 7-day money back guarantee so I emailed them and asked for a refund. Which they agreed to send a courier around to my work address to pick it up on a given date. He didn't turn up, but did turn up at my home the following week.
We agreed that I would send it back, as they were going to deduct the postage cost from my refund anyway.
I sent it back through ParcelForce just before Christmas but hadn't received a refund by the 15th Jan, even though it was signed for. To make it worse, I hadn't had any replies to my emails either and there was no phone number on the site or directory enquiries.
I finally got my money back after a lot of detective work and phone calls to a motorcycle racer they sponsor.
May this be a warning to you all. Only buy the original A-Bike from official retailers. Don't think that anything called a 'Mini-Bike' is the same thing.
I though I would be saving myself £50, but after that I've been put off from buying the real thing.