Probably would have been better off just taking the $11k and be done with it. Would've saved the hassle and a couple of headaches. I tried to sell my first car myself years ago. I will never do it again. I must have taken 8 people on a test drive, answered a million questions, waited for people to come over and see the car only to have them never show up. And then deal with offers of $8 & $9k for a car that was $17k in the blue book.
I felt like pulling my hair out before I finally sold it to a guy 3 months after I put it on sale. And then there was issues with the title because typical Miami, he wanted to do some shady stuff and I wanted no part of it. He wound up doing it the right way a week later.
Unless you have a lot of patience, save yourself the aggravation.