Based on the data provided, we can observe that the coin has had an average auction price of 91.9 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 that the historical average auction price is 91.9 euros, we could estimate a maximum purchase price of around 100 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 auction price.