Ok, please pardon me if this is a bad question, stupid, illegal, dumb, or just plain...well you get it.



I have noticed that the exchange rate is different between exchanges, (MtGox, BitStamp, CoinBase, BTC-e)

If I buy BitCoin from CoinBase at $830, it seems like I could then turn around and sell it on MtGox for much more, lets just say $880 (there is a huge price difference, even now, just look - https://www.mtgox.com/ | https://coinbase.com/charts)

We can also assume the accounts are fully verified and all in USD.

What are your thoughts on this? and is this illegal??

Thanks!