Based on the data provided, we can observe that the coin in question has had an average auction closing price of 160.43 euros in previous auctions. Additionally, its current condition is 80 (VF+).

Considering that the coin will be auctioned in the upcoming days with a starting price of 70 euros, and it has had an average starting price of 95 euros in the past, we can estimate that the closing price could be around 160 euros, similar to the historical average closing price.

Given that the coin is in good condition (80 VF+), and considering that in previous auctions it has reached prices higher than 160 euros, we could consider a maximum estimated purchase price around 180-200 euros, depending on the demand and competition in the auction.