Found 2 биржи where OpenVPP is traded for ETH. According to the data on 23 March the most optimal price to exchange OVPP for ETH is Ξ0 for 1 OpenVPP. This rate is fixed at Bilaxy at the maximum trading volume of the pair OVPP/ETH - 18.3 ETH.
The maximum daily trading volume is observed in the OVPP/ETH trading pair at Bilaxy and reaches Ξ 18.31 (339.71% of the exchange's total trading volumes) at the price Ξ 0 per 1 OVPP.