I also got stung by him last year when he was selling RaceFace bars cheap (too cheap). I did a lot of Googling and found an old add with his moblie number on More dirt, number was 077369 53183
I did much the same as exupmonkey, and Paypal was refunded in less than 24 hrs.
The list bellow is what I came up with linked to either Danny or Sean Madden :-
Jamie Reading
Norman Pierce
dhroberts on stw
Madden96 on moredirt
Madden-96 on Pinkbike
UK-Harvey1992
cheeseytoes on MLG (major league gaming )
dhjamie on stw
madden96 on stw
normanpiercemtb on Pinkbike
imadden on The Tech Game
I think he/they live in Liverpool, as I saw a picture on one of his posts with him and a few mates getting on a train at Liverpool, presumably heading for Llandegla, which he states as being one of his favourite places to ride. He is also linked to a beauty salon in Liverpool, which may be where a partner works. He has used the salon email/Paypal address on some items he sold.
Hope this lot helps anybody still waiting on either a refund or bits from this little scrote 😈