I cannot locate a trailer price guide like NADA anywhere on the Internet

I am looking for a good price for a 1997 Featherlite Model 9444 trailer.

It is 7 X 17 ft Gooseneck type, 3 horse slant load with rear tack area and front dressing room with bed area.

It in excellent condition. Has new tires and had been taken good care of.

Any ideas what the Featherlite is worth?

Thanks