This bundle pack contains ten 7-inches from K Artists and our Friends & Neighbors. Its contents were randomly selected by Calvin Johnson and span decades of underground music.
It's a mystery wrapped in a cardboard enigma! You don't know what you're getting. Neither do we. But we guarantee it'll be great!
"You are getting" is future in that case. Present continuous is used because it is an arrangement or it has been planned. But what I don't understand is that the action of buying has not been planned necessarily before or shall I understand that if you accept to buy it, an arrangement is created and present continuous is justified?