Based on the data provided, we can see that the coin in question has had auction prices ranging between 20 and 180 euros in previous auctions. The coin's condition has been maintained within a range of 70 to 95.

Given that the historical average auction price is 45 euros and the current condition of the coin is 75 (VF), we could estimate a maximum purchase price around 50-55 euros. However, keep in mind that the highest auction price was 180 euros, so there may be room for negotiation in the current auction.

In summary, an estimated maximum purchase price for this coin in the current auction could be around 50-55 euros, considering the historical data and the current condition.