You certainly won't get as much money selling as a lot rather than piece by piece.
I think the biggest questions is; will you come back later and try to reacquire things?
Based on the example in your sig, it will cost you significant time and money to repurchase them if you do decide to come back.
Ive got:
A1200T with fast ata, pci bus board, voodoo 3, ethernet card, soundblaster, cocolino, 040/240ppc card.
OS's 3.1 3.5 3.9 4.0 orignials
spare A1200 test rig with 8mb expansion
a few ide devices
cd32 joypad
various joysticks
amiga mouses
zip drives
zip disks
About a 1000 floppy disks maybe more (im the one hoarding them lol)
some original games
Manuals and books
Spare 2.5 and 3.5 hds and caddies for quick swapping
3 or 4 external floppy drives
and more bits and pieces, ive forgotten the rest.
The problems im getting is time and space cos the kids have nicked them both. Would rather the money than see it all rot away if i never get time for it. How long can it stay boxed in a loft? Will i ever get time again?