To estimate a maximum purchase price for the coin that is going to be auctioned, we can consider several factors based on the provided data:

1. Coin Condition: The coin in question has a condition rating of 95 (EBC+), 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 observing the auction prices of coins with similar conditions (95 and 90), we can see that auction prices have varied, but there are examples of auctions reaching up to 320 euros in exceptional conditions.

3. Average Auction Price: The average auction price for this coin is 98.48 euros, which gives us a reference for what buyers have been willing to pay in the past.

4. Average Starting Price: The average starting price is 69.12 euros, indicating that auctions usually begin at a lower range.

5. Auction Trends: Since the coin has been auctioned 73 times and sold 62 times, there is good demand for this coin, which may influence the price.

Based on these factors, an estimated maximum purchase price could be in the range of 120 to 150 euros, considering that the condition is high and there are precedents of auction prices exceeding 150 euros in similar conditions. However, since the market can be volatile, it is advisable not to exceed this range unless one is confident in the demand and interest in the auction.