Given that the coin has a grade of 95 (S/C-), which is a very high grade, and considering that the starting price is 2500 euros, we can estimate a maximum purchase price.

In previous auctions, high-grade coins often reach prices that can be significantly higher than the starting price, especially if there have been no prior sales and demand is high. However, since there is no historical sales data for this particular coin, it is difficult to make an accurate estimate.

Taking into account the grade and the starting price, an estimated maximum purchase price could be in the range of 3000 to 3500 euros, assuming there is interest in the coin and bidders are willing to compete for it. This is just an estimate, and the actual price may vary depending on the dynamics of the auction.