Based on the data provided, we can observe that the coin in question has had an average starting price of 46.31 euros in previous auctions, with an average closing price of 76.42 euros. The current condition of the coin is 75 (VF).

Considering 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 current starting price is 30 euros and the condition is 75 (VF), we can consider a price range based on previous auctions.

Since the highest closing price was 130 euros and the estimated highest price was 250 euros, and considering the current condition of 75 (VF), we could estimate a maximum purchase price around 150-180 euros.

Therefore, an estimated maximum purchase price for this coin in the next auction could be around 150-180 euros, considering historical data and the current condition.