Can you buy a rtx3070 non LHR for 1400$ right now? Is this a good move for the price or it's plain stupidity? One is available in my home street at a computer spare part store
This is a good investment if your money is at home or in the bank at 1-2% per annum.
If you have inexpensive electricity, then you will pay off in 1 or 2 years, and then you will have a free mining farm.
Video cards always pay off, you just don't need to sell them when mining is not very profitable. Mine cryptocurrencies and pay for electricity when mining is not profitable. The prices for cryptocurrency are constantly growing.