That is very low mileage for that year truck!
What about trading it in?
I traded my 2004 F250 XLT SB 4X4 V10 Screw with 65K miles, at Folsom Lake Ford and got an even $16,000 on June 1st. It was in 'good' condition, not excellent.
They gave me exactly what Kelly BB quoted for my truck (Trade-In) on May 30th, when they ran the deal.
I will tell you, driving this new F150, is like night and day from my previous truck, both in ride and handling and at the gas pump !!