For startes, I have Free electricity and not worried about fan noise.
I have a PC that i would like to use for mining, just to start out, with 1 gfx card.

Question, What would be the best GPU to get on a budget ? (looking at used cards atm)

If this works out and i regain the costs on that card i would like to add a 2nd one, and so on.
I am aware of the risers that are needed  with multiple cards, and that is not a problem.

I did do a lot of reading, but most of the time people look into cards that are also power efficient and the ones they underclock the voltage, etc.
I don't care about electricity as it free.
The AMD or Nvidia choice isn't crystal clear to me as i read a lot of different stories, just as the older AMD cards that are still performing very well yet they
can be bought used for a decent price, that sounds interesting.

I would like to hear from the people with a lot of experience here what they would buy (just 1 card, free electricity) ?

Any advise is welcome !