I just started playing 3-4 days ago(very addictive!) and ive won 25+ cards from spinning but not a rare card yet which is frustrating. I know you said you don't want them in the bazaar because they are called rare cards for a reason and that you wont to preserve the longevity/replay value of the game. You should make them available through the bazaar for a steep price, it will keep the replay value alive while giving beginner/intermediate players an actual goal to work for. I don't know what would be a fair price but based on how much money i have been making per game i would say 2000-2500 maybe more since i know all of your top 50 players probably have over 5000 money(dont know what the currency is called).