I get the archiving thing Jayson, it is what it is... To be complete, all that. And I even understand if a carded guy wanted these because everyone collects differently, and completeness means a lot (even more so to carded guys in my experience). But I can't see even a carded guy assigning them any kind of "praise" I guess, is what I'm saying. They'd be a horse pill someone had to choke down for the sake of completeness... Or in your case, the sake of the site. You'd have to really REALLY be into that cardback to try convincing people the purchase you made was a wise one if it weren't more a "necessity", ya know?
If anything, I think praising them at the $20 price is kind of like saying, "I accept $20 for repaints/repacks as a great idea!", which seems like a bad stance to take.