Based on the data provided, we can observe that the coin has been auctioned three times in the past, with an average auction price of 138.33 euros. The current condition of the coin is 75 (VF).
Additionally, the previous prices of this coin in previous auctions were as follows:
1. In the auction on May 25, 2017, the coin was sold for 125 euros, with an estimated price of 250 euros.
2. In the same auction on May 25, 2017, another similar coin was sold for 140 euros, with an estimated price of 200 euros.
3. In the auction on February 2, 2021, the coin was sold for 150 euros, with an estimated price of 170 euros.
Given that the coin will be auctioned soon and considering the historical data, we could estimate a maximum purchase price around 170-200 euros, taking into account the previous average auction price and the estimated prices in previous auctions. It is important to consider that the condition of the coin can also influence its final price.