Harry said:This is a great option...i think it should be integrated in a future version of k2.
Yeah, just ended up switching clients to JSeblod since all Joomla modules work with it. Not as pretty as K2 out of the box, but a lot more flexible. Maybe an option for you or your clients, otherwise your best/easiest bet is to build a shopping cart like module for k2 (which I'd rather kill myself, since it's structure is feeling a little antiquated).