i'm trying to set up a site where a substantial amount of PDFs will be sold both individually and a subscription will be sold to a library - so anyone from that library can visit the site without a paywall (so, based on IP). think JSTOR, for example, or a newspaper archive.
I'm really comfortable with WordPress (can even dev plugins for them) but not sure something like this exists within the WP plugin (or set of plugin) worlds. If so, i would love to know!
If not, can someone point to a platform that is a) hopefully FOSS, b) can be developed with php/sql of some sort, and c) is user-friendly enough that a client can enter new PDFs herself and put them up for sale?