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

1. Condition: The coin has a condition of 70 (VF-), which indicates that it is in an acceptable state, but not of the highest quality. This can influence the price, as coins in better condition tend to reach higher prices.

2. Auction history:
- The average hammer price for similar coins is 116 euros.
- In the past, coins with a similar condition (70) have been auctioned and reached hammer prices of up to 24 euros and 50 euros in recent auctions.
- The highest auction price in the past for a coin with a similar condition was 190 euros, although this may not be representative if the condition is not exactly the same.

3. Starting price and demand: The starting price is 50 euros, which may indicate current demand. Given that there have been 10 previous auctions and 9 sales, this suggests there is consistent interest in this coin.

4. Price trends: The average starting price of 86.6 euros and the average hammer price of 116 euros suggest that, in general, coins of this reference tend to sell above the starting price.

Taking all these factors into account, an estimated maximum purchase price could be in the range of 100 to 130 euros, considering that the condition is a limiting factor and that interest in the coin appears to be solid. A price of 120 euros could be a reasonable target, given the price history and current condition.