This is old news, have a look at these threads to learn a bit more about camcoll/pande/keithp...
http://www.airgunbbs.com/showthread....ighlight=pande
http://www.airgunbbs.com/showthread....nse-from-Pande
I did one deal with him where I swapped a break barrel Whiscombe JW50 for a Theoben Imperator FT SLR88 .177 and topped it up with 100 notes, yes a temporary moment of madness...
As soon as I got back in my car I realised that it wasn't right, so called him back and offered him another £100 for a swap back to how things were, so he would have made £200 for nothing (this was around 10 years ago). When I called he told me to "foxtrot oscar" and called me an annoying c**t and told me to never call him again, I didn't. Most people on here wouldn't have a problem with that and it's an unwritten rule that people I have bought guns from have 'first refusal'.
He sold that JW on here a few years later for around 800 pounds profit
By the way this is the ONLY bad deal I had on the BBS, most were good as gold.