It's got to be worth at least £6k. If the £3k service bill is correct and the MBSH checks out, it looks like a gem. Decent C43's are hard to come by, even more so in estate form.
Specialist market though, usually takes time to find a buyer and the price will no doubt edge down accordingly until the right buyer comes along. C43's must be bottoming out in value these days. He says hopefully.
Well, the seller is a Mercedes-Benz Club member, respected restorer of W123s and a thoroughly decent chap, so I reckon if he says it's a good 'un, it very likely is exactly that. I'll be seeing him on Sunday, so I'll ask him about it if anyone's interested.