Used original parts question

[drdave69]

Don't know if this is the correct spot for this. Move it if necessary.
I have some used parts left over from a previous restoration and would like to get them out of my attic.
The main part in question is a drivers side deluxe door panel. Came out of a '69 Z/28 with orange houndstooth and someone wants it for their Z11 resto. It has new paint and carpet on it and doesn't have any cracks.
What would something like this be worth?
I don't want to seem like I am ripping someone off and vice-versa.