I keep checking my classifieds and I am seeing 2 types of listings.
First is someone saying they will buy any and all mining GPUs. Saying why sell 1 by 1 when you can sell everything to them. They mentioned that they won’t pay inflated prices. Most likely buy GPUs at half price and flip on ebay?
Second is someone selling a GPU and every ad it mentions “never mined with”. So you know it was mined with.