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

1. Current Condition: The coin has a condition of 75 (VF), which indicates that it is in quite good shape. This generally translates to a higher price compared to coins in lower condition.

2. Auction History:
- The average hammer price for this coin is 147.05 euros.
- In previous auctions, hammer prices have varied, with some reaching up to 480 euros, although this can depend on the condition and demand at that time.
- The last auction with a hammer price of 250 euros for a coin in condition 75 suggests that this is a reasonable range to consider.

3. Starting Price and Average Starting Price: The current starting price is 100 euros, and the average starting price in the past has been 82.38 euros. This indicates that the current starting price is slightly higher than the historical average.

4. Demand and Supply: Since there are no auctions scheduled in the coming days, this could increase competition among bidders interested in this coin.

Taking all these factors into account, an estimated maximum purchase price could be in the range of 200 to 250 euros, as this aligns with previous hammer prices for coins of similar condition and the trend of increasing demand.

Therefore, a reasonable maximum purchase price could be 250 euros.