geizhals.de/palit-geforce-gtx-750-ti-stormx-ne5x75t01301f-a1331680.html?hloc=at&hloc=de
New 750ti that your PSU will easily be able to run and that's still below 100€.
Your best bet IMO.
If you're looking for used parts, try ebay-Kleinanzeigen or register at an online forum like hardwareluxx / pcgh.
Quote (sniper1220 @ 6 Oct 2016 19:56)
Yea you're going to need a new PSU first as a 220W is really bad. You want something around 700W+ which is going to cost around 70-80$ (US) and then the GPU is going to be around 100-200$ (US) depending on which one you buy and manufacturer.
This post is useless btw.
For modern (Gtx 10xx series) single-GPU setups you'll hardly ever need more than a quality 400W PSU, even if you overclock both your CPU and GPU...
700W will run you an overclocked i7 paired with a 10xx SLI.
This post was edited by aneas on Oct 7 2016 02:04am