These and the 1951 commemorative florins are nearly always found in good shape, probably due to people hoarding them.
They are a relatively low mintage florin at 2,000,000 each (according to my 2011 rennics book) I find it hard to understand why they are not a more valued coin.
The 1927 parliament house coin has increased in value over the last couple of years and they have the same mintage numbers.
It may be because of the silver content in the 1927 coin as it is Stirling silver where the 51 and 54 coins are 50% silver.
Never the less they are nicely designed coins and in my opinion should be more valuable than they are at the moment.