Board Thread:Questions and Answers/@comment-16245405-20130823162256/@comment-10773451-20130915202743

Items that doesn't appear since 2005 became rare in 2008. 2006 in 2009. 2007 in 2010. 2008 in 2011/12. 2009 in 2013. 2010 in 2014. 2011 in 2015. And after 2012 items will take 5 years to become rare.