Based on the data provided, we can observe that the coin has had an average auction price of 64.27 euros in the past. Additionally, the condition of this coin has been described as 75 (MBC).

Taking into account the previous prices of the coin in past auctions, as well as its condition, we can estimate a maximum purchase price for this coin. Given that the average auction price has been 64.27 euros and the condition is 75 (MBC), we could consider an estimated maximum purchase price around 70-80 euros.

It is important to note that the price of a coin in an auction can vary depending on various factors, such as demand at that specific moment, the number of bidders in the auction, among others. Therefore, it is advisable to pay attention to the auction and adjust the offer accordingly.