A buyer may buy a basket of goods and services at a store/marketplace, some of which are physical. The latter factor requires gathering and transportation services. A store/marketplace may be virtual, physical, or a combination of them. The goods and services may be produced by the seller and/or other parties.

There are several options available:

In the latter two cases, the physical store/marketplace may be just a demo one, i.e. not for buying, or pure virtual.