It would not surprise me if miners at this point have 3 homes by the end of their life. I think we will only see more of this moving to lower priced electricity places with old asics.
most of my gear that i get comes to me after having a few owners , as u say it moves down the line with each new owner having cheaper power , useually once it gets to me i run it till it breaks , or is only breaking even for a while then i gut the useable parts off them i.e fans, psus controllers etc and trash the rest
Its kinda the circle of life on miner gear. The great thing is this moving from one miner to lower priced electricity miner keeps prices up some on old gear, allows old gear to be sold pretty easily (as long as its bot obsolete).
Pretty amazing process but it does just work. Nothing like this happened during GPU days. It was sold to gamer at end in most cases.