iMac Resale Price? (UK)

You could haggle over the BT KB and the Trackpad....Might get an extra £50.00 but you might have to wait for a sale...I'd say that was a pretty good price.

im looking at selling my top spec 2009 iMac with an SSD, i have no idea what to look for lol

I would take that.

Actually just as a reflex I would say £975! Try for £1000, meet in the middle.

I sold my iMac mid 2011 27" yesterday for £900.
I sold it early before the market became flooded with iMacs.
The fun I had was factory resetting my mac back to SL as it wouldn't reinstall, no sandy bridge drives on my disc, 10.6.3, I needed 10.6.6, which meant I had to get the new buyer to buy ML and then format my ML and reinstall it under his account whiles he was waiting.

Imho....

adjusting for depreciation/exchange rate you can get around 850-900 pounds.
Can go higher based in the cosmetic estate of your computer, remaining warranties and kind of use/care the computer has got.

But if you have a upfront 950 pounds offer, my advice is go for it!