the closest solution i found for this is the download module plus the subscription module, meaning that you can set the certain file to be downloadable only by certain group and to joint this group, the user can subscribe to the group using the subscription module. but however, it is still far away from "clickbank" module...which atlease allow user to upload(this is possible) and set the particular price for that item and also the payment method or at lease paypal link will be fine.

anybody got any idea on this kind of module?