Based on the data provided, we can observe that the coin has had an average auction price of 71.86 euros in the past. Additionally, the condition of the coin in this auction is 70 (MBC-).

Considering that the condition of the coin is relatively good and the historical average auction price is 71.86 euros, we could estimate a maximum purchase price around 80-90 euros for this particular auction. It is important to consider that factors such as demand at the time of the auction and the availability of interested buyers can influence the final price of the coin.