NGL would be bummed if they announced just a boxset and not individual pressings. I don't care to own anything before American Candy, but that and LLL are two of my white whales. I'm so desperate for those two, i'd buy it and try to sell the rest of th boxset individually to offset the cost of the set.
I would be surprised if it wasn't new music or some sort of album announcement. They typically release or announce something near 8213 fest and Pat mentioned recently that they would be going away for a bit after this to take a break and then work on new music.
Spotify does (sometimes). That's where I got a copy of the self-titled album by a band called The Maine.