ooo wait, which one is it, unmasked series 6 or brown suit series 6? Brown suit's worth more lately than unmasked (the series 6 not the series 3). The foils on series 6 are gold on unmasked and silver on brown suit.
There are probably 50-60 different foil chases out there, but unless you want to keep them in package, they aren't very cool. Just one-sided foil cards.