From the 1977 Senegal Stamp Series - Champion Du Monde De Boxe

MUHAMMAD ALI 

60F Stamp (Blue two stamp panel)

COMBINED SHIPPING: 

$2.00 shipping Canada/$2.50 USA

$4.50 International

for the first single non-graded card plus $0.25 per additional card won/purchased.

via Lettermail so should be no issue with tariffs