I had a serious offer towards purchasing a bookstore.
The problem is that I know what I want to offer and sell but I don’t know whether I’d be successful at doing so.
It may also require "taking the store to the public" whether that is setting up a booth at a gun show, a tattoo show, a car show, an arts show, a book show...
And I say don't ignore out of print books. Can't go to the brick and mortars for what they can't order.