Footycardtrader
OzCardTrader
the easiest insert card to get is the best & fairest which is @ 1:12 packs, not very inviting to duck down to the shop for 4 or 5 packs as chances are you will pull nothing.
1:12 is the lowest insert ratio but overall you should get an insert 1:5 packs... (7 different inserts per box plus 50% chance to get one of the prem cards plus the rare chance of a redemption...)