Legitamate internet giveaways?

u know how on alot of websites theres always an ad where its like WIN A FREE XBOX 360. but in reality u have to buy a 5 year subscription to something which is as much as the 360 lol. but i was curious is there any like real legit companys who will mail u like an actual ipod video if u go thru there company survey? or something along those lines?