to buy 1 BTC at 240 USD ?

this is not a real and credible quotation, considering all other BTC exchangers sell 1 BTC at around 650 USD.

This quotation comes from an exchanger who is actually in declared "maintenance mode" https://www.mtgox.com/img/pdf/20140215-BTC-transfers.pdf
and that is experiencing serious problems both in fiat and btc withdrawals
http://www.coindesk.com/mt-gox-users-awaiting-funds-survey-reveals/
http://www.coindesk.com/mt-gox-announces-downtime-bitcoin-deposits/
https://www.mtgox.com/press_release_20140207.html


Besides..   take a look to mtgox twitter account...
https://twitter.com/MtGox

Be careful