If you want to buy a Kyocera Marbl from Virgin Mobile's website, don't.
Wal-Mart (at least mine, and likely yours) has just gotten in shipments of this phone...which they're selling for $19.97 plus tax.
So buy the Marbl from there and save yourself $10.
An interesting sidenot though: it looks like Wal-Mart doesn't technically "have" the Marbls in their system yet. So you'll havev to wait a few days before you can actually buy them. For those who can't wait Virgin Mobile's site is probably the only other choice (well, BestBuy has them but they're even more expensive). But I'd say wait...if you want the Marbl, get it from Wal-Mart.
Oh, and maybe wait for my review while you're at it :)