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

1. Starting and hammer price: The current starting price is 80 euros, and the average hammer price in previous auctions is 146.06 euros. This suggests that the coin has a selling potential higher than the starting price.

2. Condition: The coin has a condition rating of 80 (MBC+), indicating that it is in fairly good condition. In the past, coins with similar conditions have reached hammer prices that vary, but generally, prices tend to be higher for coins in better condition.

3. Auction history: Reviewing previous hammer prices, it is observed that on several occasions, coins with similar conditions have reached hammer prices ranging between 80 and 149 euros. For example, in a recent auction, a coin with a condition rating of 80 was sold for 149 euros.

4. Price trends: The average hammer price of 146.06 euros and the fact that there have been 32 successful sales of this coin in the past indicate that there is a consistent interest in this reference.

Based on these factors, an estimated maximum purchase price could be set in a range between 140 and 160 euros, considering that the average hammer price and the condition of the coin are favorable. Therefore, a reasonable maximum purchase price could be 150 euros.