Found 2 биржи where Api3 is traded for ETH. According to the data on 5 March 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 - 10.4 ETH.
The maximum daily trading volume is observed in the API3/TRY trading pair at Paribu and reaches Ξ 593.54 (1,773.88% 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.