The specs that I have now are due to the upgrades I've listed: the NVMe is a WD_BLUE SN570 1TB, and the RAM sticks are Patriot Memory DDR4 3200Mhz, both bought new on Amazon, and then there's the AX200 Wi-Fi card that I bought used (you could also spend €5 more and buy it new but I didn't see the point in doing that).
The base laptop (the one I bought for €180) has an 8th gen i5 and came with 8GB of RAM (single stick), and you can find these specs below €200 on Ebay (very good chance if you also participate in the many auctions that are there, as an example here's one if you're in the US: https://www.ebay.com/itm/266452790554).