Based on the data provided, we can observe that the coin has had an average auction price of 311.62 euros in the past. Additionally, the condition of this coin has been described as '75 (VF).'

Taking into account the previous prices of the coin in past auctions, as well as its current condition, we can estimate a maximum purchase price. Given that the average auction price has been 311.62 euros and the current condition is 75 (VF), we could consider an estimated maximum purchase price around 330-350 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 buyers' willingness to bid higher.