To estimate a maximum purchase price for the coin in question, we will consider several factors:

1. Coin 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. Starting Price: The starting price is 750 euros, which sets a baseline for the auction.

3. Price History: By looking at previous auction prices for coins with similar conditions (95 and 90), we can see that they have reached hammer prices that vary significantly. For example, in 2019, a coin with a condition of 95 was sold for 550 euros, and in 2014, another with the same condition sold for 1600 euros.

4. Price Trends: The average hammer price for similar coins is 180.15 euros, but this may not reflect the true value of a coin in excellent condition like the one we are considering.

5. Supply and Demand: The coin has been auctioned 75 times in the past, with an 84% sell-through rate, indicating good demand.

Taking all these factors into account, an estimated maximum purchase price could be in the range of 1000 to 1500 euros, considering that the condition is high and there are examples of previous sales that have reached higher prices. However, given the starting price of 750 euros, it is likely that bidders will be willing to offer more, especially if there is interest in the coin.

Therefore, a reasonable maximum purchase price could be 1200 euros.