Based on the provided data, we can observe that the coin in question has had an average auction closing price of 118.89 euros in previous auctions. Additionally, the current condition of the coin is 70 (VF-).

Considering that the coin's condition is relatively good and the average auction closing price in previous auctions has been 118.89 euros, we could estimate a maximum purchase price around that value or slightly higher.

Given that the starting price in this auction is 25 euros and the average starting price in previous auctions has been 79.78 euros, it is likely that the closing price in this instance will be closer to the historical average closing price than the current starting price.

Therefore, an estimated maximum purchase price for this coin in the current auction could be around 120-130 euros, taking into account the condition and historical closing prices.