1990 celica gts hatchback VALUES

I recently purchased this car. My question is this...NADA lists this car at 2700.00 , Kelley at 2500.00 , but Edmunds lists at 1085.00! All listings are for good condition at private seller values. Can anyone tell my why there is such a discrepancy....and wat should I consider to be the true value. My car is white, all power, everything is operational, runs like a dream, and has 220525 miles on it. Thanx for your replies.