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

1. Starting Price: 75 euros.
2. Condition: The coin has a condition rating of 70 (VF-), indicating that it is in relatively good shape, although not of the highest quality.
3. Auction History: It has been auctioned once in the past and sold for 130 euros, which is the hammer price. This suggests that there is interest in the coin at that price level.
4. Average Starting and Hammer Price: The average starting price is 82.5 euros and the average hammer price is 130 euros. This indicates that, in general, coins of this reference tend to sell in a similar range.

Given that the coin has a condition rating of 70 and considering the previous hammer price of 130 euros, an estimated maximum purchase price could be set in a range between the previous hammer price and the average hammer price.

Taking all these factors into account, an estimated maximum purchase price could be approximately 120 euros. This is based on the interest shown in the previous auction and the condition of the coin.