Found 2 биржи where Astar is traded for ETH. According to the data on 19 July the most optimal price to exchange ASTR for ETH is Ξ0 for 1 Astar. This rate is fixed at Gate.io at the maximum trading volume of the pair ASTR/ETH - 23.1 ETH.
The maximum daily trading volume is observed in the ASTR/USDT trading pair at Huobi Global and reaches Ξ 750.31 (176.29% of the exchange's total trading volumes) at the price Ξ 0 per 1 ASTR.
The minimum price to buy ASTR for ETH is 0 - on the exchange Gate.io.