BuddyPress.org

Building a marketplace isn’t an easy feat. I coded a plugin that gives each group it’s own marketplace. It took a long time to code and it’s quite specific to the use I needed it for. What rogercoathup suggested might be your best bet from what I’ve seen so far.

To be honest, I wouldn’t even start with just ‘small to medium’ coding experience. It’s better to let a developer do it for you. There’s a lot of security stuff to think about and a marketplace needs to be basically bomb-proof!

EDIT: just saw that this thread is actually 5 months old…