Remember those books that were polybagged with a random Ultraverse Series I card? One of those was Prime 4 (I am still trying to verify that the polybagged Prototype variant cover for that book actually exists … I’ve never actually seen one although I know someone who has).
I actually spent five bucks on this book since it had an extra card in the polybag. Why? I’m not sure.
Edit: Fixed the post to point out that the polybagged variant is the one I haven’t seen (it would have a UPC symbol on the front and come bagged with a random card).