Interested in purchasing a Micro Folding bike from the mid 1970's. Made in Birmingham England by E.A. Radnall Co. May also be interested in some of the later versions such as that made by TD Cross & Sons, Falcon and Cresswell.
The Micro version of this, made by Pashley regularly appears on UK ebay, usually in yellow, single or three speed, keep you eye out and you will find one. They can be quite cheap, although there was one on there a few weeks back for an OTT £150, think a third of that and you should be ok.
There is also a thread on here about a one off 20" wheel variant with front suspension, if you do a search you are sure to find it.