Like the article states, BE CAREFUL when considering a used mining GPU. Miners treat these things like dirt and will do so to you as well to dump them for all the $$ they can muster. Most used cards will have damaged hardware in one way or another.
https://www.neowin.net/news/as-crypto-crashes-used-mining-gpus-with-defective-memory-being-sold-without-warning/
SA