Talk to Jon at Keystone and a dozen is 74.95, although the shipping is unclear. Could end up around 90. They have free going on but some other thing was mentioned.
I like the predator vanes but I don't know if they are as tough as the blazers if that matters (biscuit users). I know they fly better out of mine. They do weigh what they claim, the blazers are heavier than claimed. I think they weighed 9 grns a piece, supposed to be 5. That stiffness could be the difference in their flight characteristics in a cross wind as the shape is the same.
I'm going to order some too.