Could it be an NP15C? I found this illustrated listing for a sold one in the US (and there are some listed on NZ and Australian sites).

http://www.elderly.com/items/20U-9683.htm

This would seem to be a similar if not identical spec to the EAN15c sold in the UK. http://www.takamine.com/?fa=detail&mid=115&sid=65

This info might help with price comparisons fro other 2nd hand ones on offer (plus new ones).

I played one a few years back - and yes, I tohught it was nice too.

Good luck!