Based on the data provided, we can observe that the coin in question has had an average auction closing price of 88.63 euros in previous auctions. Additionally, its condition has been described as '85 (ebc-)'.

Considering that the coin's condition is quite good and the average closing price has been 88.63 euros, we could estimate a maximum purchase price around 100-110 euros. Given that the starting price in the upcoming auction is 60 euros, it is possible that the coin will sell for a price close to that estimated range.

It is important to note that the final auction price may vary depending on the demand at that specific moment, but based on historical data, a maximum purchase price of around 100-110 euros seems reasonable.