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

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

2. Price History: By looking at previous auction prices for coins with similar conditions (around 95), we can see that auction prices have varied. For example:
- In 2019, a coin with a condition of 95 was auctioned for 30 euros.
- In 2020, another coin with a condition of 100 was auctioned for 65 euros.
- In 2022, a coin with a condition of 95 was auctioned for 25 euros.

3. Average Auction Price: The average auction price for this coin is 20.06 euros, which is also an important indicator.

4. Recent Trends: In the most recent auctions, the auction prices have shown a range that can go from 12 euros to 55 euros, depending on the condition and demand.

Based on these factors, an estimated maximum purchase price for the coin in question could be in the range of 30 to 40 euros. This range takes into account the good condition of the coin and previous auction prices for similar coins.