Restored Antique RV 1920 Dorris model K-4

I found it rusting in a barn in Montana. After 4 years and
lots of work, my labor of love is 100% restored! The RV of my
my dreams reaches a top speed of 15 miles per hour,
lacks front brakes, uses oil lamps for headlights and features a
dashboard intended to deflect debris rather than display information.
I included a picture below. Does anyone have any idea of it's value?

http://urlxp.com/go/sjohnsonpic4