The South Carolina Small Business Chamber of Commerce is the latest group to oppose a sales tax exemption for an Amazon.com distribution center that could employ 3,000 people in Lexington County. The group says the state should not be encouraging people to buy online instead of from South Carolina stores. Amazon has hinted it might not build the distribution center without the tax break. The company wants lawmakers to exempt state residents from paying sales tax when buying from Amazon. Gov. Nikki Haley doesn’t support the tax break worked out by former Gov. Mark Sanford. Amazon also was offered a free site, property tax reductions and state job tax credits.