Based on the data provided, we can observe that the coin in question has had an average starting price of 2427.41 euros in previous auctions, with an average closing price of 2965.37 euros. The condition of the coin is described as '80 (MBC+)'.

In previous auctions, closing prices have varied, with the highest price reaching 3300 euros. However, the estimated highest price was 3500 euros, although it was not reached in the auction.

Given that the coin will be auctioned in the coming days and considering its price history, condition, and demand for it, an estimated maximum purchase price could be around 3200-3500 euros. It is important to note that factors such as demand at the time of the auction and competition from other bidders can influence the final closing price.