It's a great deal and I'd have it if it... however I have an identical one in my shed at the moment built up, and I'd probably only move this one on and make a couple of quid. That being the case I'm going to pull out and let someone buy it to actually use!
The full bike in the shed (original bits) I'd let go for around £400. I've seen the frames go for anywhere from £150-350 depending on age, condition and shock spec.