Based on the data provided, we can see that the coin in question has had an average auction price of 231.56 euros in previous auctions. Additionally, the condition of the coin is described as '85 (ebc-)'.

Some previous prices of this coin include an estimated price of 80 euros with an auction price of 110 euros in a 2011 auction, an estimated price of 120 euros with an auction price of 150 euros in another 2011 auction, and a starting price of 200 euros with an auction price of 170 euros in a 2012 auction, among others.

Given that the coin will be auctioned in the coming days with a starting price of 125 euros and considering its auction price history, condition, and previous prices, we could estimate a maximum purchase price around 250-270 euros. This takes into account the previous average auction price and the condition of the coin.

It is important to note that the final auction price may vary depending on the demand at that specific time, so it is advisable to monitor the auction to adjust the offer accordingly.