I've seen the occasional good deal on eBay from dealers. The trick is buying at a good price. For 1 ounce coins that would be around 3-4% over the spot price of gold. Anything higher than that and I would not buy. Canadian Maple Leafs tend to have the best prices and are a good coin to buy.
I have not pulled the trigger on any deal yet because I have been able to meet minimum spend in other ways and I live outside of the USA most of the time so it's less convenient for me to do.