Hey Scythe I'm not sure if many people know how to do this so I'm selling a way to get, for example, unlimited poketfrogs potions/stamps. It can get any type of in app purchase for free.
Example

This requires a jailbroken device im using a jailbroken 2nd gen ipod touch for mine running 4.2.1 green poison jailbreak. If Asked for will provide examples of other games. I will only be releasing how to do this to 10 people for $2 each(to get how many stamps and potions i have would've cost me about $120 so this is not a scam i would not be making any money.)
My MSN:brandon.pin@live(dot)com

 

This can be done free with just a google search.

 

As posted above, This is not really a method worth selling. I found it myself the first day I jailbroke my iphone, just through general browsing.

 

iAP Cracker - insanelyi Cydia repo = Profit!!!!

 

iAP cracker ... search for it in cydia lolx ... funny