Your welcome Goldface.It certainly is an interesting hobby.There are so many coins that are worth collecting.Some very rare,others not so much.1930 commonwealth penny,Holey Dollar,1923 halfpenny,Aust.Silver coins before 1946 are sterling silver after 1946 they are 50% silver.The 1966 round 50cent piece (80% silver)is a nice collectable worth about $10.I'm sure some other members will chime in with coins to look out for.It is endless when it comes to collecting coins.Google is your friend,have fun collecting.