There should be LOTS of cheap cards for everyone to buy for at least the first couple months after its launched. That said, don't miss out on some of the current rewards cards going for 13-20 cents. Now is the time to be acquiring them. They will all have their uses going forward and I'm already using most of them in my Silver League battles. When used correctly, they can really have a big impact.
In the meantime, just keep adding #SPT, #ONEUP, #DEC, and #SPS as I think they're all going to continue to very well. It's still early....
Thanks for the tip. I'm only waiting for the current season to end before buying anything since the price of the new cards are currently inflated.