Based on the data provided, we can observe that the coin in question has had an average auction closing price of 127.38 euros in previous auctions. Additionally, its current condition is estimated at 70 (VF-).

Considering that the coin's condition is relatively good and the average auction closing price has been 127.38 euros, we could estimate a maximum purchase price around that value or slightly higher, taking into account that the coin has been sold in the past for higher prices.

Therefore, an estimated maximum purchase price for this coin in the upcoming auction could be around 130-140 euros. It is important to note that the final price will depend on the demand at the auction and other factors that may influence the decision of potential buyers.