Found 4 exchanges where Quant is traded for EUR. According to the data on 3 September the most optimal price to exchange QNT for EUR is €55.51 for 1 Quant. This rate is fixed at Bitvavo at the maximum trading volume of the pair QNT/EUR - 523.3 ths. EUR.
The maximum daily trading volume is observed in the QNT/USDT trading pair at BitDelta and reaches € 7 416 287.15 (0.384% of the exchange's total trading volumes) at the price € 56.24 per 1 QNT.
The minimum price to buy QNT for EUR is 55.51 - on the exchange Bit2Me.
The maximum price to buy QNT/EUR is 55.56 - on the exchange CEX.IO.
Warning: some QNT markets show an abnormally wide spread — those quotes may be unreliable (thin liquidity or off-market trades). Cross-check the volume against several venues.