I am looking for a script that will allow people to buy credits for use on my site. I need credits to be purchaseable in 10, 20, 50, or 100 blocks. I need to be able to easily ammend the prices through either editing a variable in the script or through a form that I can easily integrate into my admin panel. The script needs to check that the payment is verified before the credits are added. Im sure this is really easy but I built an IPN script before and it always went wrong Ideally I need it to be in procedural PHP as this is all I know for integration although if you can provide full instructions then OOP Will be fine. Please give your quotes and timescales. I do need this quite quick. Thanks