Based on the data provided, we can observe that the coin has had a starting price in previous auctions ranging from 9 to 100 euros, with final prices ranging from 12 to 440 euros. The condition of the coin has mostly been good, with values ranging between 70 and 95.

Given that the starting price for the upcoming auction is 25 euros and the condition of the coin is 85 (VF), we can estimate a final price close to 40 euros, which is an intermediate value compared to previous final prices.

Taking these data into consideration, and considering that the coin has been sold in the past at a wide range of prices, my recommendation would be to set a maximum purchase price around 45 euros. This would allow you to compete in the auction without exceeding the price and ensure a possible acquisition at a reasonable price.