Hello Joe...the 1985 and 1986 Aussie 5 cents pieces were only available in mint sets, never in circulation.
Sometime one can be found on ebay but not often. There is a 1986 coin on ebay now for a buy now price of AUD20.00. (350331790088)
Have not seen the 2010 coin as yet except in the 2010 min sets either.
Sir BongALong is enjoying his stay with me but cannot keep him away from the "mead".
Thanks again for my Knight in shining armor.