This is a good place to start and spot on if you're honest with answering the questions. I would guess with low miles and if the body is on good condition and no wrecks you're looking between $19,000 to $20,000.
Kelley Blue Book - New and Used Car Price Values, Expert Car Reviews
I was planning on trading my car in on something else that I really didn't need and mine was appraised at $21,500. 2014 base with a spoiler and no other modifications with 27,000 miles on it.