I am playing about 4-5 months, though already 25lvl. The game is developing, the future is bright. Kyle &co cares about this games. :)

It's a bug that rabid bite isn't in booster pack, they will fix it if they read this thread.

250g, maybe it will be a bit more after restocking, 275g ?

The merchant is out of stock, and there is no rabid bite in booster pack, it's the only card that you can't have by buying a booster pack, you can only wait the merchant to restock.