While pictures always help, that is, from my understanding, a very rare trailer.
I doubt many of us here a really qualified to help you with a price on something that’s akin to chicken teeth. Only manufactured for two years and about 1,000 sold in total if my info is correct. Thought to be the smallest airstream ever made until Der Klein Printz showed up on the scene.
Maybe Joe, the resident historian here can chime in, I’m sure he, as well as the rest of us, would love to see extensive photos.
Since it’s family, it could go either way, but maybe you can reach a price you both feel good about?
Did I mention pictures?
Thanks and best of luck,