The penny's dropped - I bought my SRT from this guy last year!!
Don't know why I didn't make the connection before, especially considering the location - maybe it was the "fanatical about my cars" remark that clicked - that's exactly what he said to me and, although mine wasn't quite as immaculate as he claimed, it was still very nice - anyway, I bought it and it's a great car - no regrets - it's been spot-on ever since! The only downside was that the washer hose was split and the front tyres were shot on the inner edges - which he didn't mention and I didn't spot in my excitement on the day - but no big deal and easily sorted.
Oh, and we've only just got rid of the strange mix of dog smell and furniture polish that pervaded the interior...!
He is a car nut, apparently mainly alternating between SRT Crossfires and various Porsches - he asked me to make him my first call if I ever decided to sell it as he'd probably buy it back - and mine was one of two he had for sale at the time (both black) - that was 15 months ago - and I don't think he's much of a dealer because, of the money I paid, well over 90% went straight to the finance company - and, although I can't be certain, I suspect he paid more for it than I did, so not much of a profit there!
IIRC, he'd got his eye on a particular Porsche he'd always wanted, hence selling the two SRTs.
This recent activity suggests he's still dabbling so, despite the doubts expressed about his recent SSB, my experience indicates he's OK to deal with and the cars are probably fine too - well worth further investigation anyway.