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

The average final auction price for the coin in previous auctions has been 46 euros, with an average starting price of 22.5 euros. Taking these data points and the history of previous prices into consideration, as well as the upcoming auction, we can estimate a maximum purchase price for this coin at around 50-55 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 monitor the auction and adjust the offer accordingly.