This is what you can buy
Pokeball - $200
Greatball - $700
Net Ball - $400
Dusk Ball - $1000
Quick Ball - $1000
Super Potion - $700
Antidote - $200
Paralyze Heal - $300
Awakening - $300
Burn Heal - $400
Flame Orb - $800 - Increases fire power/if user hit, opponent gets burned.
After Getting Your 4th Gym Badge
Dive Ball - $1000 - Better catch rate if it's a water type Pokemon.
Iron ball - $1000 - Slows speed, but makes flying types get hit by ground type moves