Gtx1060 and P106-100 are still a good GPU to buy for mining if one has free electricity? What about gtx1070 and 1080? I have free electricity in my home right now and I want to take good advantage of this opportunity 😜😜
All video cards that you wrote are very old. I have been using 1060,1070,1080 for 5 years now, but I service to them myself and know their condition. The main problem when purchasing these video cards will be finding these video cards in good condition. If you don't have experience, then you can buy buggy junk.
Each video card needs to be checked before purchasing for at least 10-20 minutes. Ideally, a few hours, but usually you will not be allowed to do this.