got a pair of tilted and normal coins, are they rare and what should I expect if I sell the pair? the coins are circulated, in VF grade.
(http://i457.photobucket.com/albums/qq296/hannu2009/50%20c%201970%20tilted%205_zpsimcewiun.jpg) (http://s457.photobucket.com/user/hannu2009/media/50%20c%201970%20tilted%205_zpsimcewiun.jpg.html)
Not sure about rarity - the best I could find were the third and fourth letters at http://web.archive.org/web/20091015090305/http://members.optusnet.com.au/~ihartshorn/feature/fa1.htm
From memory I've found both in change but I don't have any statistics on which one is rarer.
I have about 80 of them (approximately even number of each type) I have noodled in last few months -EF to aUNC. Used to get good money for them on eBay but last few listings haven't attracted a bid.
Maybe best to sit on them a while and keep an eye on sales.
Tilted 7 is less common but not scarce.
Downies have these listed here
http://www.downies.com/Royal-Australian-Mint/Australia-1970-50c-Tilted-7-Variety-With-Normal-50c-Issue-Uncirculated-Coins/6066/productview.aspx