Well coin collecting of any kind should really be about what you want in your very personal collection, and the coins that give you pleasure to behold. Far less important is the value, and future value. In fact many people that go into it for investment make grave mistakes without sufficient knowledge of the subject. You may just find that your coin skips along at the same rate as inflation, or like so many 80's US investors, that the value takes a nose dive! I'm afraid I cannot tell you how high to go as I do not know too much about gold Roman coins, how much money you are able to spend on your hobby, or how comfortable you really feel with that coin. You can of course be satified that if you do win it on ebay for however much, that the second highest was just a few pounds below you! My advice, hold off a bit, get a decent book, read up and then come back to the one on the other website and search regularly on ebay. Chris