Shop

A Shop (or Store North American usage ) is any place where players can buy items, where each player has a personalized shop. Each stock is unique to each player. As of September 2, 2009, there is no longer a main stock with an infinite quantity.

A shop is often accessed via a merchant, who is (in this context) a non-player character. Players can left-click to talk to the character and ask to buy/sell items, but can also usually trade with the merchant directly by right-clicking and selecting the appropriate option from the context menu (see Game controls).

Types of shops
Currently, there are 36 types of shops, not including The Grand Exchange.

History
Originally, there was no player stock and everything had its set price. For example, if you sold a ruby to a gem shop (which usually only has a player stock) the gem would not cost less than the others.