Based on the data provided, we can observe that the coin in question has had an average starting price in previous auctions of 25.6 euros and an average closing price of 40.6 euros. Additionally, it has been auctioned five times before, always selling.

The condition of the coin is described as 70 (VF+), indicating a fairly acceptable condition but not in perfect preservation state.

When looking at the previous prices of the coin in past auctions, we see that it has had a fairly variable price range, with estimates ranging from 30 euros to 70 euros, and closing prices ranging from 35 euros to 50 euros.

Given that the coin is in an acceptable condition and has had a good sales history in the past, we could estimate a maximum purchase price around 45-50 euros, considering the average closing price and previous estimates. However, keep in mind that the final price in an auction can vary depending on demand and other factors at the time of the auction.