The astrophysics mounts are all sold without handsets, as the handsets are not required for imaging. The handsets are optional extra. As a case in point I bought a used Mach 1 GTO without a handset and have been using it happily without a handset. A handset costs 1000 USD new and I thought it is an unnecessary expenditure for something that that is not strictly required (a nice to have, not must have), hence my looking at the second hand market. In fact, I understand paramount mounts do not even have handsets.
Anyway I can perfectly understand your wish not to sell separate, and I do wish you find a buyer for your very nice equipments