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

1. Current Condition: The coin has a condition rating of 75 (MBC), indicating that it is in fairly good shape, but not of the highest quality (FDC).

2. Auction History:
- The average hammer price for similar coins has been 80.88 euros.
- In the past, coins with a similar condition (75) have had hammer prices that varied, with examples selling for 35 euros (2019-07-03) and 60 euros (2018-10-16).

3. Starting Price: The starting price is 30 euros, which may be a good indicator of the expected sale.

4. Recent Trends: In the most recent auctions, the hammer price has shown a trend of being higher, with examples of hammer prices of 65 euros (2024-07-11) and 160 euros (2024-09-19) for coins of similar condition.

5. Average Hammer Price: Given that the average hammer price is 80.88 euros, this suggests that, in general, coins of this reference tend to sell for higher prices.

### Maximum Purchase Price Estimate
Taking all these factors into account, a reasonable maximum purchase price for this coin could be between 70 and 90 euros. This is based on the historical hammer prices for coins of similar condition and the average hammer price.

Therefore, an estimated maximum purchase price could be approximately 85 euros.