I reckon the prices have dropped about £100 in the last couple of months for SR4/Sterling 4H's. I deffo think they are undervalued at the mo, but then again MIA Jazzes and P's are also down (Std S1 P's in good nick seem to be down around 4-450 against 500 this time last year). One thing to consider tho is out of the 4000 or so memebrs on BC, maybe only 2/3 of those are active and only half of those on the GAS trail so the money pool is small compared with the bay. So if you can be arsed and have the time then maybe the bay it is and get the favourable response MarkyTB had.
I sold my 2004 St4 a few months back for £650 and the best offer I had on my 2005 SR4 recently was £550. At that point I guess you have to be pretty GAS'ed up to sell. Fortunately I wasn't ^_^
All that said tho, that was a pretty good score H.