Everybody is in the cloud now, where there are no hand-me-downs, or at least none we get to use.
https://www.ibm.com/blogs/cloud-computing/2019/03/05/20-perc...
And are you really going to run your entire staging environment in spot instances? What happens on peak days?
(My recollection was they loved everything about AWS except the price tag, although creating a personal staging environment for me to debug their issue in would have only made a marginal difference to that total cost.)