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

1. Condition: The coin has a condition rating of 95 (EF+), indicating that it is in very good shape. This generally translates to a higher price compared to coins in lower condition.

2. Starting price and previous prices: The current starting price is 125 euros. In previous auctions, the average hammer price has been 148.73 euros, suggesting that coins of this reference tend to sell above their starting price.

3. Auction history: In the auction history, we have seen hammer prices that vary, but there are several examples where the hammer price has exceeded 180 euros, especially for coins in similar conditions.

4. Recent trends: In the most recent auctions, hammer prices have been in the range of 160 to 190 euros for coins of similar condition.

Taking these factors into account, an estimated maximum purchase price for this coin could be between 180 and 200 euros. This is based on the hammer price history and the good condition of the coin. Therefore, a reasonable maximum purchase price could be 190 euros.