I've seen miners posting up full rigs for sale on my local Craigslist. Guess with Volta comming in March everyone selling
Mining rigs have been on CL as long as there have been mining rigs. Only clueless hobbyminers that haven't been in the game long would sell their rig "to get ready for Volta" - like that's going to be any time soon or have sub-stratospheric pricing/availability.
Ampere / Consumer Volta will prob be announced end March at GDC/GTC but not ship until June/July. Won't be able to get your hands on one for long after that regardless, even if retailers limit orders -- flippers with sophisticated bot scripts won't even flinch.
Pascal will not get drastically cheaper when Ampere ships, because global mining power will keep it in place as long as it outperforms its electrical cost. In other words larger operations won't switch out Pascal to add Ampere; they'll simply add Ampere.
I think the GPU shortage is actually going to get worse heading into summer; people crying now have no idea what's ahead.