Why don't you start downsize the duplicated hardware? Why do you keep more then 1 A500 or A1200? For spare parts? Ok, but you can store then in a garage, loft or other, and just let it be a single A1200 in your retro room.
You can take the boards, floppys whatever out and store them in less space. Why would you need 3 or 4 A500 cases? Keep the best one, and sell the others.
2x A4000T ??? Boy, there are people killing to have one, and you have 2??? Keep one and sell the other. And so one...