The OP's degassing process sounds time consuming but rewarding. Knowing that you're sending good working gear out into the world, benefiting photographers and the environment, and being paid for it, is a good thing.
Interestingly, I've begun moving along similar lines, although without the glut of gear that the OP discusses. It would be good to minimize the number of lens mount systems: at the moment mine are Leica M, Canon EF, micro four thirds in digital, and Pentax K and Minolta MD in film. The 'problem' I have is in getting into a lens mount system that provides the best dynamic range, video performance and autofocus that is available, and hopefully use as many of my existing lenses as possible.
As I have Canon lenses, this means either Canon bodies or a system to which Canon can be easily adapted. Leica M lenses means either a Leica body or again, a system to which M lenses can be adapted. Adapting M lenses is problematic for most mirrorless systems with the exception for the Leica SL/SL2/SL2-S and TL/CL. Fortunately, Canon lenses are okay on micro four thirds with the right adapter.
I'm loathe to get rid of a system as each has its own benefits: Leica M means tiny high quality lenses with loads of character and charm. Canon means mainstream support and a good range of bodies. Micro four thirds means very portable gear with excellent video capabilities. But eventually I'm going to get a full frame mirrorless system, it just needs to make good use of my existing gear.