The Bid Price
In the context of the over-the-counter market, the term "bid" refers to the highest price a market maker will pay at any given time to purchase a specified number of shares of a stock. The term "ask" refers to the lowest price at which a market maker will sell the stock.
The ask price (also known as the "offer" price) will almost always be higher than the bid price. Market makers make money on the difference between the bid price and the ask price. That difference is called the "spread".