Coinbase are not "legit". "Legit" is a "carder word" used by criminals and low-lifes. """I be LEGIT, bro!" They can't speak correctly so they say sentences like "Oh, dey be Legit, broooooo!"

Coinbase are a scam, plain and simple. They will look for any reason at all to lock your account, freeze your coins, return your ACH 7 days later, give you a requoted bad price, etc... stay away from them. Go with a "real" btc exchange overseas (but of course not Gox).
Coinbase have many trolls on this board hyping their services with words like "I've tried coinbase and they're great".
-Pffft.