My findings below –
Business Classification (quite similar to @maos) :
- Business-to-Business (B2B)
- Business-to-Customer (B2C), e.g. Walmart, Target
- Customer-to-Business (C2B), e.g. Website for freelancer to join business projects
- Customer-to-Customer (C2C), e.g. Online Auctions such as eBay, TradeMe in New Zealand
Others include B2G, G2B, where G is for government services
Business Models
- Drop shipping – Only operate storefront. It is up to suppliers to handle shipping and inventory
- Wholesaling and warehousing – Need to handle storefront, inventory, shipping and tracking
- Private label and manufacturing – Selling by sending prototype and plans to customer, and then gather capital for production. Kickstart.com is an example
- White label-- Similar to private label but selling products that are already sold successfully by another company
- Subscription Ecommerce – products are delivered to customer in a regular, scheduled interval
Source: https://selfstartr.com/types-of-ecommerce-business-models/