B2B e-marketplaces where buyers and sellers come together

B2B e-marketplaces - Based on the offline notion that is the market (a place where buyers and sellers come together), and applying the concept of aggregation of products, an e-marketplace has numerous sellers feeding goods/services into an online facility where multiple buyers can source goods. In the concept, The virtual marketplace is run - as a business model - by a third party who facilitates trade between the various buyers and sellers, taking a percentage of transactions or a fixed fee for the service. The concept is also known as the butterfly model - a concept that originated in the late 1990s - because a pictorial representation of multiple buyers and sellers surrounding a virtual marketplace resembles a butterfly's wings around its body.