Excluding the latest generation gpu, i.e. the 4xxx that passionate gamers will buy at exorbitant prices, no miner will buy cards at the current time in the uncertainty of the date of transition of eth from pow to pos and perhaps the medium-power and not recent gpus will return as before at decent prices
The medium power cards will only work for people with really cheap electricity,mostly in Europe the price of energy is on a constant increase because of the war in Ukraine which has hyper inflated the prices.It would be difficult for such cards to offer good returns for miners who will buy them.The difficulty of Eth is not decreasing it is staying constant in the best case despite the price of Ethereum falling so I don't see any valid point to buy those cards unless you have really cheap electricity.