I'm not sure what the price your paying is, but stay away unless they are free. Lol
Seriously, unless your a base collector, don't buy retail, blaster or anything of the likes as the hits will only be $2 gu cards.
All the chase cards are in the hobby boxes.
And saying that 3 packs of 5 cards isn't a lot of base. You might get a $0.50 insert per pack but it's really not worth it mate.