To estimate a maximum purchase price for the coin in question, we can consider several factors based on the provided data:

1. Current Condition: The coin has a condition of 75 (MBC), indicating that it is in fairly good shape, but not among the best qualities.

2. Auction History:
- The average hammer price in previous auctions is 119.22 euros.
- The coin has been auctioned 16 times, of which it has sold 14 times, indicating good demand.
- Previous hammer prices for coins with a similar condition (75) have varied, but there are examples of hammer prices of 300 euros (2012) and 350 euros (2013) for conditions of 75 and 90, respectively.

3. Starting Price: The current starting price is 30 euros, which is quite low compared to the average hammer price.

4. Recent Trends: In recent auctions, hammer prices for coins with a condition of 75 have been around 40-50 euros, suggesting that interest in this coin remains moderate.

Based on these factors, an estimated maximum purchase price could be in the range of 100 to 150 euros, considering that the average hammer price is 119.22 euros and that the condition is 75. However, since the starting price is low, there may be an opportunity to purchase at a more competitive price.

Maximum Purchase Estimate: 120 euros.