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

1. Condition: The coin has a condition rating of 95 (S/C-), indicating that it is in very good shape. This generally translates to a higher price compared to coins with lower conditions.

2. Previous auction prices: By looking at the hammer prices from previous auctions for coins with a similar condition (95), we can see that the hammer prices have ranged between 1,200 and 2,100 euros in recent years. For example:
- In 2022, a coin with a condition of 95 was sold for 1,800 euros.
- In 2023, another coin with a condition of 95 was sold for 1,800 euros.

3. Starting price and average hammer price: The current starting price is 1,800 euros, and the average hammer price for this coin in the past has been 1,184.44 euros. This suggests that the starting price is reasonable, but it also indicates that there may be room for the hammer price to be higher, especially given the condition.

4. Recent trends: In the most recent auctions, hammer prices have been in the range of 1,800 to 2,100 euros for coins of similar condition. This suggests that there is solid demand for coins in this state.

Based on these factors, an estimated maximum purchase price for this coin could be in the range of 1,900 to 2,200 euros. This range takes into account the good condition of the coin and recent hammer prices in similar auctions.