Are you sure it's an '86? Looks like '87 was the first year for the Black Lightning model: http://www.vintagecannondale.com/catalog.html

I'd pay more for Suntour Superbe, Sprint or GPX...but less for Edge or lower. Here's a hierarchy chart for Suntour: http://equusbicycle.com/bike/suntour...d-range-89.jpg