Based on the data provided, we can observe that the coin in question has had an average starting price of 137 euros and an average selling price of 242.5 euros in previous auctions. Additionally, it has been auctioned off four times before, selling in all of them.

The current condition of the coin is rated at 70 (VF+), indicating that it is in an acceptable but not excellent condition.

Considering the previous auction prices of the coin, as well as its current condition, we could estimate a maximum purchase price around 250-300 euros. Given that the selling price in the last auction was 220 euros and the coin has sold in all previous auctions, an estimated maximum purchase price in the mentioned range could be a good reference for this upcoming auction.