Definitions of retail:

• noun:   the selling of goods to consumers; usually in small quantities and not for resale
• verb:   sell on the retail market
• verb:   be sold at the retail level

  Example: "These gems retail at thousands of dollars each"

• adjective:   selling or related to selling direct to the consumer

  Example: "Retail trade"

• adverb:   at a retail price

  Example: "I'll sell it to you retail only"