I recently acquired a 2007 with 1,600km on it from new.
I took the bike out yesterday after a full charge and comfortably achieved 25.6 miles across a variety of speed, mostly; 30mph, 50mph and 70mph. I most certainly would have averaged 40mph over the duration of the ride.
Each "group" of cells have been charged individually, I do have an excel spreadsheet monitoring the voltage.
I am in Kent, UK. Ideally, collection would be preferred but appreciate that may not be easy. I am more than happy to box/pallet these up, but you need to arrange post.
Regarding price, I am honestly not sure (feel free to make an offer). Looking through the forum there haven't been many come up and it is difficult to gauge a price.
I was looking at somewhere around £300, but like I said, try me.