I run a WordPress site for an art gallery, in which they requested that I implement a "Submit your artwork" page on their site. This page would direct the "artist" to pay a small fee in order to submit their artwork.
After the small fee has been processed the "Thank You" page would give them a link to something like this: Artistaday. More or less, once they paid a small fee they would have a temporary link to submit their artwork to.
I am curious, are your PayPal services adequate for this?