Is there a reason?

[jz2016cubs_PSN]

That the base round cards are more expensive than the rare round? Is it because there are more base round cards, so they are in a way "harder to get?"

[KaptinKrunch00]

Well, you get a guaranteed rare after completing TA4 to 100%, and you also get another pack right after the finest player, which has a 25% chance of getting the rare round, and the conquest also has a 25% chance to give you a rare round, so basically you have a 12.5% chance to get the rare card 3 times, and if you do all 30 teams, that percentage goes up, leading to an influx of rarer cards.