I had this issue as well
But my solution, much to my chagrin, was to limit myself to one box small box for my computer detritus. I moved into an apartment with my girlfriend which has some limited storage options. Funny enough she of course did not get rid of nearly the amount of stuff I did. It would appear that I had held onto every computer, router, switch, and associated cable I had procured over the last decade. I drive a pickup truck and it filled the bed taking this stuff to the recycler sans hard drives of course. Now I am down to:
1 HP laptop (read: desktop replacement with built in battery backup)
1 spare body for said HP laptop
1 media PC
assorted android phones
1 very tightly packed rubbermaid container holding my cables, mounting hardware for the desktop, 10 pack of floppy disks, various backup CD-ROMs, and a spare router and ethernet cables.