I may have just the thing.
Practically new condition airnimal joey in black. I have heavily upgraded it from stock, xtr 10x1 gearing (have front mech and shifter if you wanted to go 2x), formula Rx disc brakes, hope hubs, FSA gossamer bb386 cranks (was looking at putting on some carbon FSA 2x cranks which are also bb386 which I still have), FSA afterburner flat bars, crank bros iodine 11 saddle and the most trick part, some custom made pace rc24 forks (no, there is no such thing officially, but I may own the only set on the earth, proper decals made to suit too).
I do have the original forks.
I've also added crank bros split qrs in gold, matching up with the saddle and crank bros lock on grips. Also have 3 matching qrs to replace the frame ones as well.
So basically the only original parts are the headset, seat post and frame.
I did all this as I don't like folding bikes in principle, they all seem to ride terribly with tiny coaster wheels and awful frames. The joey bucks the trend and feels and rides like a proper bike. As I wanted to go as good as I could get, I set about upgrading the moment I got it.
One benefit of the 24 inch wheels now on there is they are the more sensible 24 inch erto size, meaning you can get decent tyres and are not limited to road slicks.
I only rode it a few times, as bought due to work relocating and needed to train then cycle. Made redundant not long afterwards so it's barely done a few hundred miles at most. Only has one tiny marks to paint (have original touch up it came with, may be dried up, haven't checked in a while). Original manual, receipt £1650 was stock price when I bought it iirc). The only thing it needs is the brakes servicing, as it's not been ridden in a long time. I do have a full service seal set for the job.
I genuinely don't think you'll find a better one, even new.
If you are interested, let me know. It's hidden at the back of my shed, but I can liberate and get some pics of you want.