It should have cost roughly $1000 - 1300 roughly when new. What you loose value on is the component group which has evolved a little bit since 03 when it was new considering it had shimano Deore shifters on it then. Unless you have upgraded the shifters / crank or anything else you might expect to get at least 1/2 of original price or at least ask for that much if it is in nearly new condition. The only problem is when you start asking you may have to come down from that price a little taking in consideration that no one would really want a f/s bike that has "outdated" components including the fork that is on the bike and the rear shock, wheel set are also outdated although they work it is still a "used" bike and you must consider that. It is not a car with a detailed maintenance history unless you had work done and have every receipt for that maintenance? It is only worth as much as someone is willing to pay for it.