Those looking for the Galaxy S III and ready to make the purchase with T-Mobile — the handset is now available for online purchases. The carrier has the Marble White and Pebble Blue models available, both of which come in the 16GB and 32GB variety. As far as the pricing goes, this is nothing we have not seen before. The 16GB model is priced at $279.99 and the 32GB model is priced at $329.99. And just to clarify, both of those prices assume a two-year agreement and come AFTER a $50 mail-in rebate. On the positive side though, T-Mobile is offering free shipping for those who make the purchase online.