Pricing for the T-Mobile Galaxy S III has been leaked out, and it matches pretty well with previous rumors (and fears) -- expensive. The 16 GB version is shown above (we're almost afraid to see a 32 GB version) and it's going to cost either $230 bucks up front and $20 monthly on the Value Plan, or $280 after a $50 mail-in rebate on the Classic Plan. If you're willing to extend your equipment-free contract, you can snag it for $450 after rebate with an early upgrade.
If all those plans confuse the hell out of you (it's OK, they confuse everyone), you can just buy it outright for $630. That's a lot of folding money for a phone that is carrier locked and possibly won't have world-wide 3G bands. Sometimes, the best things in life are not always free.