Outside of Facebook groups, are there any other recommendations for places to find a collection second hand?

In order to make getting into the game cheaper, I’ve been hunting for Imperial collections to buy, but not much luck so far. Any and all guidance appreciated!

EBay is one of the main things that comes to mind. Might be some Reddit and Discord Legion groups as well that might have some things.

I suggest getting friend splitting box if can find any used I see them going up from time time on Facebook thought