These cards were only available at the Udon booth at SDCC15 (as well as EVO2015) where you only received ONE random Silver Metal Card for every $60 purchase. A hard to obtain set all collected in one bundle.
The set includes the Chun-Li, Ryu, E Honda, and Dhalsim.
All cards are in a plastic sleeve.
Asking for $180 free shipping USA (willing to meet in LA area as well.) International shipping will be handled via estimate costs.