Based on the data provided, the coin in question has had an average closing price of 48.17 euros in previous auctions. Additionally, it has been auctioned a total of 69 times in the past, with an average starting price of 30.55 euros.

Taking into account that the coin's condition is 70 (VF+), and considering the previous prices of similar auctions as well as the upward trend in closing prices, my estimate for a maximum purchase price would be around 90 euros. This is based on the fact that a closing price of 90 euros has been reached in recent auctions, and considering the condition and demand for this particular coin.