The last stock I sold through a brokerage firm took 3 days to sell. From the time you authorize the sell, the broker takes the average price of the next three days and you get that minus their fee, which was $25 per trade/sell per stock type. I sold 50 shares of a common stock and had 5 shares of the same company's class A stock which I did not sell, but wish I had. At today's current price, I can sell my 5 shares and only get the value of 4 of them.