Based on the data provided, we can observe that the coin in question has performed well in previous auctions, with final prices exceeding the starting price in most cases. The coin's condition is graded at 75 (MBC), indicating that it is in an acceptable state.

Taking into account the previous prices of this coin, its performance in past auctions, and its current condition, we can estimate a maximum purchase price of around 90 euros. This price aligns with previous final auction prices and the average auction price of 45 euros.

It is important to note that the final auction price may vary depending on the demand at the time of the auction and other external factors.

Based on the data provided, we can observe that the coin in question had a starting price in the current auction of 12 euros, with a conservation grade of 30 (BC+). Additionally, it has been auctioned eight times before, with an average starting price of 16.43 euros and an average closing price of 40.29 euros.

When analyzing the previous prices of this coin, we can see that it has had significant variations in its starting, estimated, and closing values over time. For example, in the auction on 2021-06-02, it was estimated at 70 euros and closed at 75 euros, while in the auction on 2022-05-31, it was estimated at 15 euros but closed at 75 euros.

Considering these data and the trend of previous prices, as well as the conservation grade of the coin, we could estimate a maximum purchase price around 60-65 euros. It is important to note that the final closing price may vary depending on the demand in the current auction and other factors that may influence buyers' decisions.

Based on the provided data, we can observe that the coin has had starting prices ranging from 1 euro to 250 euros, with estimated prices ranging from 6 euros to 400 euros. The final auction price has fluctuated between 6 euros and 320 euros.

Given that the condition of the coin to be auctioned is 30 (BC+), and considering the previous prices of similar auctions as well as the average final auction price of 47.9 euros, we can estimate a maximum purchase price for this coin at around 50-60 euros.

It is important to note that the final auction price may vary depending on factors such as demand at the time of the auction and the willingness of buyers to bid on the coin.