I have a 1984 corvette with crossfire injection, 4 speed manual w/ optional overdrive on, 65K MI, VALUE?

DOES ANYONE KNOW WHERE I CAN FIND A VALUE FOR THIS CAR, IT ONLY. OR DO U HAVE ANY IDEA OF WHAT IT MIGHT BE WORTH? I POSTED IT ON CRAIGSLIST FOR TRADE AND SOME GUY COULDN'T BELIEVE I WAS ASKING SO LITTLE FOR IT SO I AM WORRIED THAT I MIGHT BE LOW-BALLING MYSELF EVEN THOUGH I WANT QUICK SALE. PLEASE HELP