Sonic Adventure Question

[TEND]

Hey, I picked up a copy of Sonic Adventure today as when I bought my used Dreamcast all I got was an empty box. Anyways the copy I picked up today is a bit different. For one it has a different ESRB symbol. Second it says 2 CD on the cover, and inside there is the game and a second disc for Sonic Adventure 2 the Trial. On the back and on the game disc it says Not For Resale.
So did I get the Limited Edition, or something weird, or what?

[Kroogah]

For a while the Dreamcast came bundled with Sonic Shuffle, and that Sonic Adventure 2-pack you got.

[TEND]

Alright, can anyone tell me about the rarity of this thing?

[sisko]

Alright, can anyone tell me about the rarity of this thing?

Quite common.