@Chris Smart... "reissues or whatever, sometime most of the time "demand" is about the money, including reissues. The surviving members of the Beatles, as well as all of the Beatles, had reissues, memorabilia.... ect., down to a science.
If you have Frank Zappa's comprehensive complete work, no need for more unless you absolutely really want it..... if you understand what I mean.
New Reissues? I'm getting regular emails from Amazon saying "Just released, Bongo Fury", or "Just Released, Waka jawaka" etc. What's up? Did the regular CD's get moved and reissued on another label? Or have they been reissued and possibly improved, remastered?