I have just purchased this mint 851ds recently after 5 years since owning my last 851 (sp3 model). For a H reg it is in amazing condition and a credit to its previous owners.
Would have loved to track down my old sp3 or purchase another one but the prices are too high for me.
For it's price of just over £2000 it puts alot of other bikes to shame, both in condition and performance.