Based on the data provided, we can observe that the coin in question has had a starting price in the current auction of 60 euros and is in a conservation grade of 80 (MBC+). Additionally, it has been auctioned in the past on several occasions, with closing prices ranging between 36 and 500 euros.

The average closing price of this coin in previous auctions has been 90.2 euros, while the average starting price has been 49.41 euros. This indicates that the coin has performed well in previous auctions.

Taking into consideration the conservation grade of the coin, its auction history and previous prices, as well as the fact that it will be auctioned in the coming days, we could estimate a maximum purchase price around 100-120 euros. Given that the highest closing price was 500 euros, and considering the upward trend in closing prices, an estimated maximum purchase price in that range could be reasonable.

It is important to note that the final auction price will depend on several factors, such as demand at that specific moment, competition from other bidders, and buyers' perception of the coin's value at that time.