I believe there are two F16 for sale in the Chicago area - a older Blade and a newer Falcon. The Blade would definitely be less than $10K. I'll send a link of this post to the potential sellers. I believe the forum name of the Blade seller is MarkMT. You could PM him.

Also, check with Matt McDonald at Falcon Marine. I did and that is where I bought my reconditioned Blade. The boat was in great shape. At one point he had some used boats on the web site as well.