To estimate a maximum purchase price for the coin in question, we will 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. Starting price and previous prices: The current starting price is 1400 euros. In previous auctions, coins with a similar condition (95) have had hammer prices that varied, but many have exceeded the current starting price. For example, in recent auctions, hammer prices have reached up to 1800 euros.

3. Price trends: By observing the hammer prices from previous auctions, it can be noted that the average hammer price for coins of similar condition is approximately 1217.23 euros, but there are examples where they have sold for over 1600 euros.

4. Market expectations: Given that there are no auctions scheduled in the coming days and considering that the coin has been auctioned 69 times with a high sell-through rate (67 out of 69), this suggests a consistent interest in the coin.

Based on these factors, an estimated maximum purchase price could be between 1600 and 1800 euros, considering that the condition is high and there are precedents for successful sales in that range. Therefore, a reasonable maximum purchase price could be 1800 euros.