see thru cards!

[dblgutshot]

I have a set of Kem cards, and a friend recently found some plastic cards at a game shop. The guy didn't know the price and just sold the packs for ten bucks each. I looked but couldn't find a name on the plastic case (see thru lid) or the cards themselves. They bend and snap back into place well, and are pretty 'soft'. However when you hold them up to the light looking at the backs, you can see thru them and see what card it is.

Does anyone know what brand these could be? Royals? something better worth picking up at this price?