I suggest this to anyone who's looking to know the value of their bike - the easiest way is to see what people actually want for it, and eBay is a good litmus test for this. Put up the bike for auction with a very high reserve for a few days and see how much it comes to. That will give you a better sense of the value of the bike, and if it sells for the high reserve, even better. If it doesn't, you'll know what to sell it at privately. It'll cost you a few bucks to list, but it's definitely a good indicator.