Not interested in paying $200 on contract for a new Galaxy S III over at Sprint / AT&T? Fret not, lost souls -- T-Mobile USA will soon be willing to sell you one for more. Much more. We just landed our hands on an internal pricing sheet for the forthcoming Android superphone, with the 16GB model listed at $229.99 on a Value Plan contract, or $279.99 (after $50 mail-in rebate, no less) on a Classic Plan contract. Those on the latter can snag it for $449.99 if you're eligible for an early upgrade, while those who'd rather not extend their contractual relationship can pay $629.99 for a (still carrier locked) off-contract handset. The notice also states that no sales can occur prior to June 21st (that's tomorrow, folks!), but of course, it'll be even later if you aren't in one of those "top 29 markets."