Repugnant market

Overview
A repugnant market is a term used to describe an area of commerce that is considered by society to be outside of the range of market transactions and that bringing this area into the realm of a free market would be inherently immoral or uncaring. For example, many people consider a free market in human organs to be a repugnant market or the ability to bet on terrorist acts in prediction market to be repugnant.

Repugnant Today

 * Illegal drug trade
 * Prostitution
 * Organ trade and Organ donation from a live donor (except in Turkey and The Philippines)
 * Horse meat (in California)
 * Payola
 * Adoption (purchase from birth parents)
 * Egg donation (for research purposes)
 * Prediction markets (in some instances e.g. 'terrorism futures market')
 * Citizenship / Immigration (Investor Visas, such as the U.S. E-2 visa are exceptions)
 * Product placement (in France and some European countries, though soon to be relaxed)
 * Votes
 * Real estate (in Cuba)
 * Commercial Surrogacy (legal in India and most US states, banned in Australia, France, Japan, and several U.S. states)

Once Repugnant, Now Not

 * Cadavers
 * Mercenaries
 * Interest on loans (still repugnant in some countries/cultures)
 * Short selling
 * Currency speculation
 * Life insurance
 * Gambling (still repugnant in some countries/cultures)
 * Metered Parking
 * Birth control (still repugnant in some countries/cultures)
 * Pornography (still repugnant in some countries/cultures)
 * Alcohol (see Prohibition of alcohol)

Once Not Repugnant, Now Repugnant

 * Indentured Servitude
 * Slavery
 * Tobacco advertising (varies by form and location)
 * Alcohol advertising (varies by form and location)