Best graphic cards for the money?

Radeon 6850? Used ones are for about 100€ here.

It's a bit more, but still very good. http://www.newegg.com/Product/Product.aspx?Item=N82E16814102908

HD 6770... But if you go higher then go with a HD 6870 or a GTX 560ti

GTX 260 is still really good and does not cost much. I still have one and can run Skyrim and such with ease. I imagine trying to do The Witcher 2 on max would be an issue though.

Check the gtx 550ti, it's right on your price range.

http://www.evga.com/products/moreInfo.asp?pn=01G-P3-1464-KR

Right here. Hands down. EVGA has the best customer service and warranty in the industry.

However, you need to keep an eye on your PSU output. You need a good amount of wattage and amperes on your +12v to power a newer GPU.

http://www.newegg.com/Product/Product.aspx?Item=N82E16814130797

http://www.tomshardware.com/reviews/gaming-graphics-card-review,3107-3.html

asus directcu 7770

I ve got GTX 285 and i am able to run The Witcher 2 and Metro2033 (they were told to be real hardware testers :D) on high. Most of other games run on ultra with no problems :)

Many other factors you need to specify to help us recommend you what's best for your system. Pairing a newer GPU with an ancient CPU would not net you much additional performance. So list your other system specs(include CPU and power supply so we can be sure that you wouldn't be maxing out your PSU), what resolution do you play at as well.

6850 is amazing for the price.

I bought a 6870 for 124€ last week, thats probably the best value/money. I would try to get a 6850 that can be unlocked to a 6870 - but I heared these are really rare these days.
The Radeon HD 7770 is a little bit cheaper and slower.