/agree. They really have done you over there.
I recently upgraded from a 520 that was YEARS old and not fit for any kind of modern day gaming. Upgraded with these main components and all modern games run at full graphics and are smoothe as silk.
CPU: Intel i5-2500k Sandy Bridge Quad Core Overclocked to 4.5MHz with 6MB onboard Cache
GFX: Palit 1280MB GTX 570 Sonic Platinum. GPU 800MHz, 1600MHz Shader, 4000MHz GDDR5, 480 Cores
[ you're avg GT520 will have the following]
1GB GT 520, 40nm, 1066MHz GDDR3, GPU 810MHz, Shader 1620MHz, 48 Cores,
Windows 7 Ultimate 64bit (Withough Service Pack 1 which slows everything right down)
My GFX card cost me about £270 (~$450) whereas your GT520 is about £30 (~$45). (I was actually surprised you can still buy them)
You can see why we say you have been conned ?