Based on the data provided, we can observe that the coin has had an average auction closing price of 45 euros in previous auctions. Additionally, the current condition of the coin is 70 (VF-).

Considering that the current condition of the coin is relatively good and that the average auction closing price in previous auctions has been 45 euros, we could estimate a maximum purchase price around 50-55 euros. This is because the condition of the coin is an important factor in its value, and the fact that it has been sold in the past for an average price of 45 euros suggests that this could be a reasonable price to consider in a new auction.