Ive got 3 pc how to earn money from them ?

Hello i ve got 2x desktop 1x laptop and tablet at home i wonder if i could use them as a passive income from my home.

specs for pcs
1. desktop
6x cores amd, 8 gb ram, 1tb hdd, 2gb gforce graphic

2. desktop
8x cores amd water cooling,16 gb ram, radeon 290x 4gb, 250 ssd 1 tb hdd

3.laptop
asus gaming laptop i7 hq, 12 gb ram, gforce 860m

so i was thinking to use one of my desktops for selling vps maybe not sure dont know where to start thats why i open this topic

i do regardly expect…

Ive got 3 pc how to earn money from them ?