After some deliberation I have just about decided that if I'm buying a folder, it will be a brompton. Probably!
Ideal model would be a P6L - X, but budget might not run to that, so standard P6 might have to do. Seem to be very few Ps on the second hand market - so how difficult/expensive would it be to change the bars etc from an "M"?
Also, what's an easy way to be sure that an older one is post-2003 (which I think is when wheelbase lengthened)? Do model names help?
Apologies for ignorance.