I know it doesn't really break the bank, but would a modest price of 70 Gil not been better? Of course I rarely get to play COR anymore so I'm still working on stacks of old regular cards, slowly whittling them down.
But honestly, when there are 12 COR's playing at any given time on a server, does SE really think 100k/stack bullets and 10k stack cards encourage anyone to play the job?