Based on the provided data, we can observe that the coin in question had an opening price in the current auction of 25 euros and is in a conservation grade of 85 (ebc-). Additionally, it has been auctioned in the past on several occasions, with closing prices ranging between 16 and 200 euros.

The average closing price of this coin has been 66.24 euros, while the average opening price has been 39.86 euros. We can also see that in the last auction, the coin was sold for 160 euros.

Taking into consideration these data points, as well as the conservation grade of the coin and previous closing prices, we can estimate a maximum purchase price for this coin in the current auction. Given that the coin is in fairly good conservation (85 ebc-) and considering the previous closing prices, we could estimate a maximum purchase price around 150 euros. This is considering that the closing price in the last auction was 160 euros and the coin's conservation is high.

It is important to note that the final auction price may vary depending on the demand from buyers at that specific moment, so it is advisable to monitor the auction to adjust the offer accordingly.