PCI Express cards based on NVIDIA GeForce GT 710 are available new for <40 EUR. Presumably there's a large clearance and used market with much lower prices. None of that is an option?
710 plays 1080p YouTube and non-graphics intensive games fine.
You can also avoid all that by getting a new design GT 710 https://www.anandtech.com/show/15713/asus-launches-an-old-gp...