User blog comment:Dragonvale16/Guardian Cross Trades/@comment-5403288-20121009201523/@comment-5409293-20121009211220

gc cards are worth more than zj, just look at how much $ people sell 5* for on the gc forums. so i don't think bmb+ is worth even 1 5*.

might also be the fact that gc is a new game so the 5* are in high demand while there are few of them.