Looks like it’s had a lot of Richie Moore work: http://www.hammondmotorcycles.co.uk/bikes/used/view/9152775/1986-bmw-r80-800-g-s-paris-dakar
This picture is not the bike for sale but it is a fully finished Richie bike which at the time had the best of the best of what he offered - I think the motor alone would have been c£6500, this one unlike the one for sale has FCR carbs. Anyway you can use it to compare against the one for sale
This picture is not the bike for sale but it is a fully finished Richie bike which at the time had the best of the best of what he offered - I think the motor alone would have been c£6500, this one unlike the one for sale has FCR carbs. Anyway you can use it to compare against the one for sale