I could recommend hundreds of rare movies but this one is one of my favorite
This rare Belgium movie is a pure enjoyment. A mix between Eraserhead (all Lynch lovers should watch it) and some other influences here and there. It is a sureal dark tale with a beautiful cinematography and a very strange story. The estetism is splendid and the music haunting. I advise you check out the trailer, this will give you an idea.
Although IMDB doesn't indicate any dvd details, it does exists (amazon has it)
And since IMDB also doesn't have any summary either, here it is
"Inhabiting a pitch-black world where daylight lasts only 15 seconds, an obsessive entomologist haunted by memories of his dead sister comes home one day to find a gravely ill African woman waiting in his bed. Their connection leads to a series of sensual, nightmarish incidents that blur the divisions between the corporeal and dream worlds"
Music from Anakrouze