Market makers set the bid and ask price, not you. The bid price is the price that you can theoretically get at that instant (ignoring the size of your sale--the number of shares that you can sell at the quoted bid price is constantly changing, but that shouldn't be an issue if you have just a few shares). If you are satisfied with that price and willing to trust the market makers won't play games with you, you can enter a "market order" to sell, which means you'll take whatever price you can get. The bid is not a contract or a guarantee, so you have no recourse if your stock actually sells below the bid price. I've entered many market orders and almost all of the time I get the bid price. If you just want to dump a single stock and aren't trading or following the stock, it would make sense to sell with a market order and not try to get exotic.

It is essential that you do this through a discount broker. Scottrade might have an office in your city, and their commission is very low, or anyone in the US can open an account with them on line. A place like Merrill Lynch will charge you an arm and a leg for a trivial amount of bookkeeping work.