Hello, This comes from my experiences.
1) Clean the car well. If that's called detailing, so be it. Use small brushes to get into cracks and grooves.
2) Clean the windows for real. Break your back bending and hit every square inch.
3) If there's anything like "neighborhoods" where you are, go to the local auto parts stores and show the guys behind the counter.
4) Look at cars.com, Kelley, Autotrader and other cars for sale and pick a price. Here's the rub.
The average price I've gotten for cars I've sold is 17% lower that my original asking price and I always gave the sale time. Many people will see your 157K miles and will look elsewhere.
5) Don't be swayed by someone telling you it's only worth "X" on Blue Book. List your maintenance.
No records?....You lose a bit.
5) I've needed 16 to 42 callers to sell a car.
6) A neighbor stopped me from putting a for sale sign in my car so zero phone calls for that one.
7) Carpet cleaner on spots where need be.
8) Clean and organize the trunk.
9) Make sure every light bulb works. A "Mountain Bear" was helping his brother check out a car and yelled out, "Hey Bill, the light in the trunk works!"
10) Remember to wash the door jambs/hinge areas. If there's a foot scuffed worn patch, touch it up.
Good luck with the sale. Kira