I have an absolutely beautiful sounding left handed full Andreas Rogge set in B with a hollow stock, chanter with Fnat and C Nat keys reeded by alan moller. This set sings and it would not annoy me in any way to keep them.
However, I have always fancied a C sharp set. So here it is, I would be prepared to swap this set for a left handed C sharp set. It would need to be a set of similar quality and definitely haved a hollow stock. So you never know maybe there is someone out there who has a lovely left handed C sharp set who would rather play in B.