Not sure about price Ally there is a mint UK turbo on Autotrader 41.5k on the clock for £2750. I think try around the £3k mark as yours is a good example with sensible mods and we know it hasn't been thrashed.
Try the usual places pistonheads, Snet, Autotrader for selling.
I know of someone looking to buy spending 2-3k (well his wife says the lower the better, I'm trying to convince him otherwise) so will let him know about yours.