Where can I buy some sestertius asset ?
Sestertius was issued last year, please consult this post for informations about it. Since then, 2246 wallets were created.
I have received concerns from would be members of the Sestertius community about the buying of these, and the process to do so. You can buy some Sestertius on Waves DEX exchange, trading them for Waves:
trading them for BTC :
or trading them for ETH