https://www.theguardian.com/australia-news/2021/mar/05/experts-warn-covid-vaccines-being-sold-on-darknet-likely-to-be-scams

Doses bought online could be unsafe or ineffective, and buyers’ money or personal information stolen, Australia’s regulator says

Three major Covid-19 vaccines are being advertised for sale on the darknet – the part of the internet not visible to search engines and which requires specialised software to access, an analysis of 15 marketplaces has found.