Found 2 биржи where Aventus is traded for ETH. According to the data on 19 July the most optimal price to exchange AVT for ETH is Ξ0 for 1 Aventus. This rate is fixed at HitBTC at the maximum trading volume of the pair AVT/ETH - 0.2 ETH.
The maximum daily trading volume is observed in the AVT/USD trading pair at Coinbase Pro and reaches Ξ 598.77 (110.46% of the exchange's total trading volumes) at the price Ξ 0 per 1 AVT.
The minimum price to buy AVT for ETH is 0 - on the exchange HitBTC.