Based on the provided data, we can observe that the coin has performed well in previous auctions. The current starting price is 50 euros, with an average starting price of 60 euros and an average closing price of 85 euros. The coin's condition is described as 75 (VF), indicating fairly good preservation.

Furthermore, in previous auctions, the coin has sold for prices ranging from 50 euros to 120 euros, with price estimates of 40 euros and no estimate in one of the auctions. The condition in the previous auctions was 90 (UNC) and was not specified in the other auction.

Considering that the coin has sold in the past for prices higher than the current starting price and taking into account its condition and performance in previous auctions, an estimated maximum purchase price for this coin could be around 100-110 euros. It is important to note that the final price will depend on the demand at the auction and other factors that may influence buyers' decisions.