The Offer Price (or Ask price) is the price an investor is willing to sell the asset. In most cases this is set by a broker who will set the price at the price he is willing to sell the asset. Stocks are sold at the Ask or offer price and not at the last price as many believe.
Explanation of Offer Price:
The easiest way to remember what the offer price is to remember that we are offering to sell something and this is the price we are offering to do so. What is more difficult to remember is that it is the broker who is generally offering to sell a stock and he is “asking” for a certain price to be able to sell it to you. This price will always be higher than the last price.