They have not gone up much at all
This is the normal price for a 1934-35 MELBOURNE CENTENARY Florin accompanied with a Foy & Gibson bag. The thing is you dont see many being sold as they are incredibly scarce - hence the addtional $400 smackers.
I saw a gEF for $350 today at Wynyard Coin Centre.
$350 is the going price in the EF grade.. i have not noted much price appreciation on these in the last 5 years TBH
1for1