Based on the data provided, we can observe that the coin has had an average auction closing price of 100.63 euros in previous auctions. Additionally, the current condition of the coin is graded at 70 (VF+), indicating that it is not in the best condition but also not in the worst.

Considering that the average auction closing price has been 100.63 euros and the current condition is graded at 70 (VF+), we could estimate a maximum purchase price around 110-120 euros. Given that the coin has been auctioned in the past for prices ranging from 12 euros to 200 euros, and taking into account the current condition and price history, an estimated maximum purchase price of around 110-120 euros could be reasonable.