Consistent with some embodiments of the invention, a web-based comparison shopping and marketplace service enables a user to search for and/or browse products of interest, and then obtain geographically-relevant, real-time product availability and pricing information for a product of interest that is offered by one or more physical retail stores. Additionally, with some embodiments, the service enables a user to conclude a purchase transaction for a product that is located at a retail store, and then provides the user with driving directions from the user's location to the retail store.