I think I paid £400 for mine with the usual scratches on the top and the odd one on the side. One B110 was slightly scratchy but I sorted it with some sound advice from @edward . The B139s had the odd dint/scratch which seems par for the course for some reason.

In terms of sound they are worth what's being asked on eBay given the restoration if the cabinets and drivers are basically mint. In fact you'll not find anything like them in the market today as far as I know. I'd say £5k+ easy if there was something like them now looking at current prices.

Yes I know imaging is not top class but I didn't find it bad at all as some say, and their presence and soundstage are unrivalled (with the exception of the biggest Tannoys) so it's just a matter of taste.