Based on the data provided, we can observe that the coin in question has had an average auction closing price of 59.55 euros in previous auctions. Additionally, its current condition is 75 (MBC).

Considering that the coin will be auctioned in the coming days with a starting price of 40 euros and has had an average starting price of 38.84 euros, we can estimate that the closing price could be around 60 euros, maintaining the historical trend.

Given that the coin's condition is 75 (MBC), and considering that in the past it has reached closing prices above 60 euros in similar conditions, we could estimate a maximum purchase price around 65-70 euros.

It is important to note that the final closing price may vary depending on factors such as demand at the auction and competition from other bidders.