Good luck with them - I hope you have generous customers, who have good taste. Providing the info. about Denis Mann I hope, will help a lot.
I've met him - we had a lovely conversation about his piece, "Dischord". (The blue panel on his site.) I was confused about the notes being played by the hands - they didn't make musical sense - then he pointed out to me that one hand was female, the other, male, quite on top of the musical incongruity.
(I used to sort the bric-a-brac for Oxfam - along with a load of other jobs - folk who work in charity shops have my respect.)