Carl Sagan Memorabilia

The most expensive item with a signature of Carl Sagan (Carl Sagan Signed Cornell University Letter Autograph PSA/DNA Authentic TLS) so far was sold in July 2013 for $999.00 while the cheapest item (Carl Sagan hand signed index card) found a new owner for $5.50 in September 2010. Sold items reached their highest average selling price in May 2014 with $249.95 and the month that saw the lowest prices with $51.00 was December 2009. In average, an autographed item from Carl Sagan is worth $100.00.