Berghaus Freeflow 35+8 rucksack, various shades of grey (probably called "dusky granite and crushed elephant" by Berghaus), about three years old or so, but in very good condition. Has bungee cord on front rather than pocket which is on most recent model, but has loads of pockets anyways. And of course has one of the sprung back systems, which definitely helps keep the sweatiness at bay.

I now prefer a lighter rucksack (although the 35+8 is not excessively heavy) and desperately want to get the unused one out of my coat cupboard, so any half decent offer secures -- or maybe not so decentif you can pick it up around Penrith, Cumbria.