I understand this post is old, but I must document my experience before I forget any of it.
I managed to get in touch with Robbie Collier today in regard to Collier Motors. His late father was the original owner of the establishment. There is a relatively substantial collection of AMC cars on the lot that are in the slow process of being sold.
The location is not actively managed and is not a salvage yard, and the lot is also overgrown, but the cars are for sale; most of them with no title. If you are interested, message me directly because I made a point to him that I would preserve his privacy.
Save me a wagon, please!