Keeping backup equipment?


I recently had to send my amplifier in For service. In its place I picked up a used Schiit Vidar to tide me over. 
So now that I have my main amplifier back and it seems to back to making me happy I’m wondering if I should keep the Schiit or sell it. On one hand it makes sense to have a backup ready to go, on the other my main amp has
been flawless for several years. So it sort of seems a waste and maybe someone, like me, may need one on the cheap.

so for those running separates, do you have backups stored away for emergency’s?
gochurchgo
Four 'systems', each rather 'site specific'.....

'Back ups'?  Not really in our audio universe....

More 'puter relics, Yes.  Some of which are still 'doing', but at different tasks than previously...

A newer and the oldest are all audio all the time.
(That, and what they're up to takes more space, however.*L*)
Let’s see how many amps have I had go out... in fifty years... actually more like 60 years... 0 failures.
I have two systems but one runs fully balanced with mostly no option, the other single-ended, so I cannot exchange electronics.