Found 2 биржи where ZKsync is traded for ETH. According to the data on 16 February the most optimal price to exchange ZK for ETH is Ξ0 for 1 ZKsync. This rate is fixed at OpenOcean at the maximum trading volume of the pair ZK/ETH - 1.4 ETH.
The maximum daily trading volume is observed in the ZK/USDT trading pair at ByBit and reaches Ξ 2,073.03 (427.49% of the exchange's total trading volumes) at the price Ξ 0 per 1 ZK.
The minimum price to buy ZK for ETH is 0 - on the exchange OpenOcean.