Based on the data provided, we can observe that the coin in question has had an average starting price in past auctions of 81.88 euros and an average closing price of 144.73 euros. Additionally, it has been auctioned a total of 17 times in the past, of which it has been sold 15 times.

The current condition of the coin is rated at 25 (BC), indicating that it is in fairly acceptable condition but not in perfect condition.

When analyzing the previous prices of this coin in past auctions, we can see that it has had significant variations in starting, estimated, and closing prices. However, the maximum estimated purchase price that I would recommend considering for this coin in the next auction would be around 150 euros.

It is important to note that the final closing price can vary depending on factors such as demand at the auction, the condition of the coin, and the willingness of buyers to bid. Therefore, it is advisable to pay attention to the auction and adjust your offer accordingly.