A suggestion for the Unofficial Released Cards section are the English cosmos holofoil fossil unlimited cards.
Here is a budget guide if you are unfamiliar @hyruleguardian,
www.elitefourum.com/t/rare-english-cosmos-fossil-holofoil-error-test-run-misprint/22232/1
My personal belief till this day, is that its some sort of test print WOTC did for the new change in holofoil pattern of fossil->base 2. No hard numbers, but quantity in my opinion from market availability is that it would be similar to that of the expedition FPOs quantities.