Drop Alert! Dumani Mandela NFT collection – Freshly minted on Opensea. When – 30th SeptemberWhere – OopenseaDiamond Tier NFT Price – 0. 33 ETH Only 50 available! Platinum Tier NFT Price – 0. 3 ETH Only 100 available! Proceeds from the auction will go towards the development of the mental health app My Minimalist – which allows users to book video calls with expert practitioners.