I think right now could be a good time to get one since we are after the holiday season when they likely had a lot of returns, but also potentially a lot of the stuff in the stores was sent back to corporate and/or will be boxed up and sent directly as these Mystery boxes. The fact that one person got the Lemax figures is a good clue of that. Those probably were leftover on the shelves of a store.
I know in my local Menards, train stuff doesn't sell well as the interest just is not great in this region.