Best Answer: A company called Bike Friday makes some nice folding bikes. So does a group called Dahon. I'll warn you that good folding bikes are not cheap. They are generally built to higher end specs and will likely cost 4 digits.
My Son has a folding bike. He has used it for just over a year and he payed about £250 for it new. He is now selling it for £130 ono. He required the bike to travel from Glasgow to Edinburgh on the bus with a cycle ride at each end. He lives in Glasgow Scotland, therefore, if you live near there and are interested just answer.
Like each little thing else, you get what you pay for. There are some inexpensive, heavy, rubbish ones, and a few gentle-weight ones with smart folding structures, folding pedals and various gears, some comprise bags to be folded into and a few don,t.