When the DVD breaks; the VHS drops...usually.
Since Sarcophilous Films debuted their so-so double feature DVD (it's not the source) of Invitation to Hell & The Last Night, I assume I was able to grab a near mint copy of the original MEGA VHS edition of Invitation... for a cool $8 from the interneting jungle of commerce.
Again, it pays to check Amazon, as the same tape appeared on eBay a few days back.
Screenshots: The Black Hole (1979)
46 minutes ago