Cheap wedding band that can pass for a real one

Can someone give me advice on picking a fake gold band that will look real? I want to buy a super cheap wedding band but am not sure what looks real and what looks fake. Does gold plated stuff look real or can people tell that it's not? Are there any places where I can get a simple band under $20? And if anyone is asking l'm not giving it to anyone else, it's for me to wear, specifically to work.