Diggin in the Goldmine:Dutch Beat Nuggets cds

What happened to this  CD set ? Now selling for $300!. It only came out in April 2019 at <$100.. 
That's what happens when some, not all, cds and box sets go out-of-print.  Collecting anything is a tricky business.  Something can be expensive today and worthless tomorrow or vice versa.
According to Mike Stax of  Ugly Things fanzine , it was too expensive to produce and there are no plans to reissue it.