Found 2 биржи where Api3 is traded for ETH. According to the data on 2 May the most optimal price to exchange API3 for ETH is Ξ0 for 1 Api3. This rate is fixed at Bilaxy at the maximum trading volume of the pair API3/ETH - 11.5 ETH.
The maximum daily trading volume is observed in the API3/KRW trading pair at Upbit and reaches Ξ 2,561.45 (1,290.31% of the exchange's total trading volumes) at the price Ξ 0 per 1 API3.
The minimum price to buy API3 for ETH is 0 - on the exchange Bilaxy.