very interesting...did you read this in that article...
One of the rarest is probably the Flaming Lips? Heddy Fwends blood vinyl, which was limited to 10 copies which originally sold for $2,500 each. The interior of each record contains actual blood from the artists who worked on it (Erykah Badu, Ke$ha, and Chris Martin among them). That?s absolutely disgusting! But also really cool?literally. Y?know, because you have to keep it refrigerated. Because of the blood. Let?s just stew on that for while and then never speak of it again.