Amazon AU currently selling Fallout 76 (console versions) for $49.76.
EB Games are trading it in for $50 until 28/11, which they increase to $60 if used towards a preorder. You also get EB World trade bonus on top of this (although seemingly not the full % value), I got $65.20 trade-in for mine.
The Amazon version also comes with some Fallout 76 collectible badges, so you get to keep that as well.
I think the additional trade in bonus must be discretionary (staff at the time). I did the same with my RDR2 copy (same deal as this), and they said no trade in bonus irrespective of level. But, either way if you want to get rid of the amazon copy, this is a good deal.