100% Genuine Mint Never Hinged (MNH) postage stamp sheet as per title and scan below. Issued by Guinea-Bissau in 2021. 

The mission launched the Crew Dragon Resilience on 16 September 2021 from Kennedy Space Center's Launch Complex atop a Falcon 9 launch vehicle. The flight was the first orbital spaceflight with only private citizens aboard: Shift4 Payments CEO Jared Isaacman (Mission Commander), Pilot Sian Proctor and commercial astronauts Hayley Arceneaux and Christopher Sembroski. 

UK 1st Class P&P is £1.35.
Airmail (Europe) is £2.25.
Airmail (Outside Europe) is £2.95.
Any additional individual stamps purchased at the same time are POST FREE.

(Please use the "Add to Basket" option rather than Buy-It-Now. If eBay have disabled the Combined Shipping feature of the Shopping Basket/Cart on your eBay site, then please login to eBay.co.uk to purchase. Extra Discounts for Multiple Purchases and Free Shipping Offers are only available on eBay.co.uk).