Right. It's a strange phenomenon, but we encounter it here all the time. Things that are widely known as high end expensive bikes like a Schwinn Paramount command very high prices, while lesser known brands of similar quality, or often higher quality, do not. There are a lot of Schwinn Paramounts out there, but there are even more people out there who want one. Your Hercules may be very rare indeed (I don't know!) but people who want one are also very rare. If you can find two such people and get them into a bidding war, it may be worth quite a bit. But if you find only one person who wants it, the price won't be as high. If you can't find anyone who wants it, and you need to get it off your sofa, well, I think you get the picture.