Highest Priced Decimal Coin

The best way would be to go through all of the prices realised for the last few years. Most are available online.

still would like to fill these gaps what is the most expecive 1c 2c 5c 10c 20c 50c that people can remember seeing

The CH,UNC Wavy 20c that you have would possibly be top for the 20c.

The $2 on 10c Euro sold for under $1000 a few months before you purchased it but when you got it that probably set the record for a $2 as well. I cant remember seeing one of the double struck $2 going over $3000.

A $1 mule in UNC would almost certainly be the most expensive $1. It may not have sold yet but will soon.

Only guessing but the proof silver 1c you purchased is more than likely the most expensive 1c.

I have no idea about the other few denominations. Can you show pictures of that 20c you got in melb?

I think there's an aluminium 1c. Don't know when or where it last sold, or for how much.
Same deal with the double headed 2007 5c pieces.

Can't find prices, but there's the scalloped 1981 20c pieces on error planchets - and a bimetallic one from more recently - about $5k ?

10 cent double reverse would do it for the 10's

$2 would be the badly misstruck ones from 2008 that are being drip fed into the auctions....

Is there a reason youre asking shane or is it just so you can tick off that you have the top one for each denomination?

I sold my scalloped 20c for $760.... but that's a long time ago. :)

1988 COA