Popular then and really unpopular now - I think people are off-loading them (despite the superior quality of the drums) because they think they're ugly.
Which means all the kids in garage bands with just enough but not that much money will start buying them - which will in turn make butcher block a popular finish again.
And, there, in a nutshell, are the machinations of fashion (drum and otherwise). I remember mid-80s getting so much grief from my band for my blue sparkle kit - it would be a very different story today.
Cheers,
David