Based on the data provided, we can observe that the coin in question has had starting prices ranging from 30 to 180 euros in previous auctions. The estimated price has also varied, from 40 to 300 euros. The final auction price has fluctuated between 36 and 4000 euros.

Given that the condition of the coin to be auctioned soon is 75 (VF), and considering the previous prices of similar auctions as well as the average final auction price of 570.67 euros, we could estimate a maximum purchase price around 200-250 euros.

It is important to note that the final auction price will depend on the demand at that specific moment, so it is advisable to monitor its evolution to adjust the offer accordingly.