http://www.firstgenerationmontecarlo.com/
This is a great resource for values, I follow these cars quite a bit and they have a top line of about $22-25k. There is one on ebay that you can find thru the above site that has paperwork but needs a complete go through that he is looking for fifteen on. Depending on the color, condition, and options, could be a good find. let me know if you take a pass, I would be interested, these are great sleeper vehicles.