Based on the data provided, we can observe that the coin has had an average auction price of 145.05 euros in the past. Additionally, the condition of the coin in this auction is 70 (MBC-).

Considering that the condition of the coin is 70 (MBC-) and the historical average auction price has been 145.05 euros, we can estimate a maximum purchase price for this coin in the current auction.

Given that the condition of the coin is relatively good and it has performed well in previous auctions, we could consider a maximum purchase price around 150-160 euros.

It is important to note that the final auction price may vary depending on the demand at that specific moment, so it is advisable to stay alert during the auction to adjust the offer accordingly.