Called on the Cobra; Here's the details...They don't think I offered enough

!!
....They're bottom line $$$ is 26.7k...I offered my '05 GT (clear title) & $6500 cash for the car! ...No question, or at least I feel, the GT should be able to sell for $20k (Stock minus the Pypes AB), 13k miles & has never seen a rainy day....maybe $19k ishhhh bottom line!!!
So we'll have to wait out the eBay game until Friday & see what happens...reserve is at $27.5k there....