I haven't really cared to look into it that much since I don't use gox, but how is their price per bitcoin always so substantially higher if no one can get money off of their site?
Again, see this thread.
The price of Bitcoin appears to be higher on Mt. Gox because, if you sell there, you only get fake US dollars you can't withdraw. All you can do with them is buy stuff on Mt. Gox. So those fake dollars are only worth $0.80 to $0.90 each.
The real sell price of a Bitcoin is what Coinbase will buy it for, because they pay up quickly. That's usually close to what BTC-E and Bitstamp quote, but way below Mt. Gox.
Only a sucker would buy
Bitcoins on Mt. Gox. Fortunately for Mt. Gox, there's one born every minute.