They can be had relatively cheap over here Sue, if you don't mind watching eBay closely. I've got two Moulton Minis (14" wheels, smaller frame) that I got for a total of £8 from the freeads. Of course, then there's the work to do. You can come over, and we can have a Moulton co-operative. If you put aside £60, you can find yourself a tidy example on eBay.