Oh this is tempting! Good idea on the group price, but for those not interested, FrightProps in FL has a pretty decent skull for 13 dollars. It looks basically the same as the Lindberg skull but is made out of a heavier, more dense white plastic.

I just ordered a gallon of RD407 for 30 bucks from them. They had quick shipping and it was pretty reasonable - I think it cost 9 dollars to ship up to IN, which isn't bad since it weighed 13 lbs. I've got no affiliation with them, just thought I'd pass the word along.

This group buy sounds really good, though. If I had known, I would've held off on the couple of skulls I bought and done this instead.