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 (EBC+), indicating that it is in very good condition. This generally translates to a higher price compared to coins with lower conditions.

2. Previous Auction Prices: By observing previous hammer prices for coins with a similar condition (95), we can see that they have reached hammer prices of up to 380 euros in recent auctions.

3. Starting Price and Average Hammer Price: The current starting price is 150 euros, and the average hammer price for this coin in the past has been 74.83 euros. However, given the high condition, it is reasonable to expect that the hammer price will be above this average.

4. Auction Trends: The coin has been auctioned 86 times, with a 72% sell-through rate (62 out of 86). This suggests that there is consistent interest in this coin, which may influence its price.

5. Previous Estimated Prices: In previous auctions, estimated prices for coins with a condition of 95 have been up to 250 euros, which can also serve as a reference.

Taking all these factors into account, an estimated maximum purchase price for this coin could be in the range of 250 to 300 euros. This is based on the high condition, interest in the coin, and previous hammer prices.