Question: The Mix Up pressings

[tuc70021]

So about 14 years ago The Mix Up was released. To this day, you can find brand new copies on the Beastie Boys website for sale. So are these really 14 year old records that have been sitting in a warehouse all these years, or were they later "runs" that didn't quite count as reissues? I'm not sure how record pressing really works - like if a label usually prints a ton at once or if they do it in phases.