Any reputable gold seller on Ebay knows exactly how much gold they are selling in each auction. On average, gold on Ebay is running about $1700/ounce. There is consistently about a 20% markup on gold via Ebay. I've seen it selling as high as $2,200/ounce with many bidders. Unfortunately you are always on the buying end on Ebay and unless the spot price rose $400 in a single month there is no way to overcome the markup.