Rare 2000 Silverado, 5sp. V-8, value?
 

I am the original owner of a 2000 Silverado, Reg. cab, short bed, std. side. It is a dark grey, LS with 85K original miles, 5 speed, with a 4.8l V-8. It is in good condition, shiny paint, no body issues, no accidents. I know a 5 speed V-8 is a rare combination. Is it worth any more than the $6000 or so listed in the Kellys etc.? I would like to get some opinions before I sell it. Thanks, jim