So, the outcome is that it looks like I'll get 30% of a new XT2 as the 595 isn't behaving as it should. Current UK retail is £529 so that would mean it would be about £370 I calculate. Not a bad offer, but I already have a XT2, which I got quite cheaply, and on ebay it looks like I might get more for it (might being the operative word).
It was quite nice having a route in Basecamp, with shaping points, and transferring it to a zumo, and the route stayed the same. Still has the dull screen and stutter when announcing directions, and lost satellite reception in the middle of nowhere.
Decisions, decisions

