The original form of trade, barter, saw the direct exchange of goods and services for other goods and services. Barter is trading things without the use of money. Later one side of the barter started to involve precious metals, which gained symbolic as well as practical importance. Retail trade consists of the sale of goods or merchandise from a very fixed location in small or individual lots for direct consumption or use by the purchaser.
Wholesale trade is the sale of goods that are sold as merchandise to retailers, and/or industrial, commercial, institutional, or other professional business users, or to other wholesalers and related subordinated services. There are a lot of online shops today. You can find anything from shoes, to food, to clothes, to even houses and cars online, so you have to be careful and try buy private proxies for your security needs.