Martin Cooper Autograph

The most expensive item with a signature of Martin Cooper (Martin Cooper signed/auto Cell Phone Inventor Communciations RARE COA LOOK!!) was sold on eBay in April 2015 for $49.99 while the cheapest item (martin cooper signed 3x5 white card-invented the cel phone) found a new owner for $0.99 in January 2013. The month with the most items sold (4) was October 2011 with an average selling price of $18.00 for an autographed item of Martin Cooper. Sold items reached their highest average selling price in January 2011 with $35.00 and the month that saw the lowest prices with $4.24 was January 2015. In average, an autographed item from Martin Cooper is worth $14.93.

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