I use to be a hardcore U2 collector back in the mid 80s ...when all we had was Record Collector - remember that publication? Ebay didn't exist, so it was really hard to find the early Irish pressings that were truly rare since the band didn't have the demand they now have.
In the collecting field 100 or less is considered very rare, 1000 hard to find (HTF) and everything that says "Collectors Edition" or Limited Edition" means nothing ...it'll never be worth what you paid. However, I will admit the new box set look very impressive. I just wish they hadn't released the 20th just a few years back ...I'm getting old, as that was already 10 years back ...geeez.