To estimate a maximum purchase price for the coin in question, let’s consider the following factors:

1. Starting price: 1800 euros.
2. Current condition: 95 (EBC+), which is a very good condition, although lower than the condition of 100 (FDC) from the previous auction.
3. Average hammer price in the previous auction: 1800 euros, which matches the current starting price.
4. Estimated price in the previous auction: 3000 euros, indicating that there was an expectation of higher value on that occasion.

Since the current condition is lower than that of the previous auction, it is reasonable to adjust the estimated price downward. However, the good condition (EBC+) and the fact that there have been no failed sale attempts suggest that there is interest in the coin.

Taking these factors into account, a maximum estimated purchase price could be positioned between the starting price and the previous estimated price. A reasonable range could be:

- Maximum estimated price: 2200 - 2500 euros.

This reflects an increase over the starting price, considering the good condition and interest in the coin, but also acknowledges that it will not reach the estimated price of 3000 euros due to the difference in condition.