The supplier also cannot force a storekeeper to advertise his goods at a minimum price. A supplier will break the law if he offers inducements to the storekeeper to maintain a minimum price. In general, a supplier cannot bully you into not discounting goods. However, there is one case where a supplier can legally refuse to supply you if you have been discounting. If, in the past year, you have sold the supplier's goods at below cost, the supplier can stop supplying you with any further goods.
Price fixing agreements for goods or services are illegal.
Some trade associations issue lists of recommended resale prices to their members. However, if all or nearly all of members of a trade put their heads together and agree to charge the trade association's recommended prices, then that is illegal. Each member would then work out individually from the cost-sheet his resale price. Many small businesses form themselves into groups and engage in joint buying and joint advertising. These activities are, on the surface, lawful.