I'm not a gold buyer, and I am not in the refining business, so I am not trying to sell or promote any one or the other of these services, but like I noted, there are plenty of them out there. I'd just like to offer some advice based on my knowledge and experience with the process.
When considering cashing in your gold, you want to ask yourself is how much of an emergency this is. Are you in urgent need of cash? Or can you wait? Almost half the battle in getting the best price for gold is not being in a rush when it comes time to sell. A lot of guys save up their gold, but then a crisis hits and they are forced to sell at whatever price they can get. Unfortunately, the emergency "have to sell right now" price is not normally as good as the price you will get if you can be choosy and wait till the right buyer comes along. So I'd say that one of the most important things about getting the best price for your gold is good planning.