Based on the data provided, we can observe that the coin in question has had an average auction closing price of 107.5 euros in previous auctions. Additionally, its current condition is estimated at 70 (VF+), indicating that it is not in the best condition, but also not in the worst.

Considering that the average starting price is 93 euros and the estimated price for the next auction is 250 euros, we can infer that there is a growing interest in this coin. Given that it has been sold in four out of the last five previous auctions, and its closing price has been increasing, it is likely that the closing price in the next auction will also be high.

Considering the estimated price for the next auction is 250 euros and taking into account the upward trend in previous closing prices, we could estimate a maximum purchase price around 260-270 euros. This is considering that the coin is in a condition of 70 (VF+) and that interest in it seems to be increasing.