If you must know, it sounds high. New cars (Z06's) are $5,000 off plus your car is used, albiet low mileage say $3,000 off. Since your extras are not in the blue book, they have no value for lending purposes. I would say your car is worth $40,000 to $41,000 retail. Unless you are in a tight market area, you will be lucky to get $41M.
I know this won't make you happy, but it is an honest appraisal.
Hey guys a dealer up here is selling used Z06 all day long for 46k-45k. I know their are a couple of dealers offering huge discounts but I think it is the end of year inventory they want to get rid of, for the 2002. After the 2002s come out hopefully the market will come back in all areas. Just proves how much the dealers are really making. Hell I still see coupes for 41-42k. Just stick it in the local paper and someone will get it. I would really like to know what happen to the market. I would have thought the fastest corvette ever would hold some value.