Based on the data provided, we can observe that the coin in question has had an average auction closing price of 132.57 euros in previous auctions. Additionally, its condition has been described as '70 (MBC-)'.

Considering that the coin's condition is relatively good (70 on a scale of 0 to 110) and the average closing price has been 132.57 euros, we could estimate a maximum purchase price around 140-150 euros. Since the starting price in this auction is 40 euros, it is likely that the final closing price will be above this value, but it is difficult to predict exactly how much it will exceed.

In summary, an estimated maximum purchase price for this coin in the upcoming auction could be around 140-150 euros.