What a car is "worth" depends on who you ask. Buyers rarely if ever get to spend exactly what they want or less, unless they settle for something not 100% to their liking. Sellers rarely if ever get their vehicles sold for precisely what they want for it, primarily because they disregard things that make their vehicle worth less than they think.
Many things include maintenance, appearance, etc.
I have honestly seen ads in the past where the following was uttered:
"Vehicle is in EXCELLENT shape EXCEPT..." then insert laundry list of things it needs, like tires, windsheild, brakes, timing belt, water pump, salvage title, flood damage, etc.
Point is...do your research.