Not sure how much more than £107 he's likely to get though really. I've had an 853 frame, forks and Dura Ace headset for £99 and a complete 853 bike for £200 from Ebay, it can be hit and miss for sellers.
Likewise. I've seen bog standard 531 frames go for only a little bit less than 853. 653 is often cheaper than 531.
Likewise. I've seen bog standard 531 frames go for only a little bit less than 853. 653 is often cheaper than 531.