Approaches presented herein enable evaluating and displaying feedback for an item distributed to a group of users, e.g., at a collaborative event. Specifically, at least one approach includes receiving the item (e.g., a topic, idea, product) from a first user, and distributing the item to the group of users, wherein the group of users is located within an identified geographic proximity to the first user. An assigned value (e.g., demand quantified though buy/sell data) is then received for the item from one or more users of the group of users, and displayed to the first user via a mobile device, along with a real-time location of each user of the group of users. In one approach, each user's mobile device displays a geographic distance from other users at the collaborative event.