Why did gamers always think they know the best? 
once they knew you use your GPU for mining they won't buy from you, well today I had to lie 🤥 to sell some GPU, I pretend like I've never heard about mining, I even tell him to teach me and he said... Don't do it, this will kill your GPU fast, and I was like on 
I don't know, hehe
If you want to sell your GPU its better not to tell anyone that you use them for mining unless they are miners.
What video cards did you sell? once they knew you use your GPU for mining they won't buy from you, well today I had to lie 🤥 to sell some GPU, I pretend like I've never heard about mining, I even tell him to teach me and he said... Don't do it, this will kill your GPU fast, and I was like on I don't know, hehe If you want to sell your GPU its better not to tell anyone that you use them for mining unless they are miners.
I usually sell old graphics cards that are already 4-5 years old. I change the thermal pads if necessary, change the thermal paste, take a photo, then do a video card test for about 30 minutes. I take photos and videos.
At the expense of mining, I answer that during this time everything is possible, because sometimes I am not the first owner. Here are the tests and a guarantee for a return within a few days if there are problems.