This is a truly magnificent Gambia SG 8, the 6d Blue, issued in 1869.  This is the VERY RARE SHADE!!! 

This one has rich color, full margins especially at the base, and full original gum.  A GEM without a doubt!  It comes with an RPSL Certificate of authenticity!

It's valued at L350 in the Stanley Gibbons Catalogue.

This item is over $100 USD so I will ship it using Priority Mail in the US, and Registered Mail overseas.  This is to ensure that it reaches you in a safe and timely manner, and includes tracking!