There are a number of things a seller should know when selling gold bullion; the spot price of gold is one of them. Whether selling online or in person, having information about the spot price can be beneficial to an investor. One way having information about the spot price can be beneficial to an investor is it can give them an indicator on if a dealer is giving them a fair price. Also by having information about gold's spot price it will help an investor determined the amount of profits they've gained from a gold investment at a given time. One thing that separates gold bullion from numismatic gold is gold bullion prices are more shaped by the spot price. Most gold bullion coins and bars are usually a little more than the spot price.
One other thing a seller should know when selling gold bullion is the fact that gold coins will more often than not go for a higher amount than gold bars. A reason for this occurrence is the fact that gold coins are generally more expensive to mint than gold bars, resulting in a higher markup for coins when buying or selling them. Many gold coins may even accumulate numismatic value as they get older. Because of this occurrence it is not uncommon to see older gold coins sell for higher prices than similar newer ones.
One final thing a seller should know when selling gold bullion is what dealers are willing to give them the largest amount of money for their bullion. A seller may know this by researching multiple dealers and seeing which ones are willing to pay the highest price. Selling bullion can be easy yet profitable if done correct. With the information discussed here, any seller will gain some understanding on what aspects they should take into consideration when selling their gold.
A good site to see more on this topic is Selling Gold Bullion, it's insightful and also informative.