Based on the provided data, we can observe that the coin in question has had an average starting price of 36.25 euros and an average auction closing price of 51 euros in previous auctions. Additionally, it has been auctioned four times in the past and has been sold on all those occasions.

The condition of the coin is described as 70 (VF+), indicating that it is in fairly good condition but not quite excellent.

The previous prices of the coin have varied, with an estimated price in the last auction of 70 euros and a closing price also of 70 euros, suggesting that the coin reached its estimated price.

Given that the coin has sold in all previous auctions and its condition is good, we could estimate a maximum purchase price around the average closing price, approximately 51 euros. However, keep in mind that the final price in an auction can vary depending on demand and other factors.