- Political & Science
The most expensive item with a signature of Guion Bluford (Guion Bluford signed NASA FDC cover Space Shuttle pilot) so far was sold in June 2008 for $80.00 while the cheapest item (GUION BLUFORD SIGNED 3X5 CARD! NASA ASTRONAUT SPACE SHUTTLE MOON AUTOGRAPH) found a new owner for $0.89 in August 2017. Sold items reached their highest average selling price in October 2017 with $77.99 and the month that saw the lowest prices with $2.04 was May 2017. In average, an autographed item from Guion Bluford is worth $3.61.