It's extremely specific to your particular area - demand, etc. Also, no one here is an appraiser (and especially not an appraiser in your area with knowledge of your market), we're all just addicts giving suggestions on what we would (or have) paid. Both of the above are also why most websites won't give you a value.
I would also note that what someone would pay for an item is also affected by mood. I "turned down" a very clean 500J Rocketeer today. I gave her a low ball offer, told her I had to put time into it to service it - it had been dormant for 20 years but the knobs still turned - and that she'd do better to try to sell it on Kijiji (our Craigslist) and if she didn't sell, to consider me. It might have had to do with the fact that the car was full of motorcycle parts and I couldn't have fit it in anyway or just that I didn't feel like the clutter which is limiting my acquisitions lately.