The only time that I have dealt with gold, is when I bought and sold gold coins...personally. Gold does not lose it's value, regardless of the form that it is in. If someone only offers you a couple of bucks, they are trying to steal it. The actual value is determined by the percentage of gold in the alloy, and the current market value, minus a small fee for the dealer. You can sell gold a variety of ways, but a jewery store would probably deal with it in it's present form.
EDIT: Depending on it's present form, it could be worth more than it's face value...i.e. rare coins.