I personally would hoard all the older Aussie coins struck before 1940s. That said, I still have to catalog these Aussie coins as well...
Update: So I went through all of them and have almost completed a collection Missing a total of 10 including some varieties. Picked out the best for myself and going to sell the rest, hopefully I'll be able to cover the original cost and maybe get a buck or two. I'll post the whole collection later.