Based on the data provided, we can observe that the coin in question has had a varied auction history in terms of starting prices, estimates, and final bids. The coin's condition has been maintained at a level of 80 (VF+), which is positive.

The starting price for the next auction is 40 euros, with a historical average starting price of 92.37 euros, and an average final bid price of 102.21 euros. Additionally, it has been auctioned a total of 18 times in the past, sold in 13 instances and unsold in 5 instances.

Analyzing the previous prices of the coin, we can see significant variations in final bid prices, ranging from 16.26 euros to 285 euros. The highest estimated price was 266.52 euros.

Given this auction history and considering the coin's condition, current starting price, and previous prices, we could estimate a maximum purchase price around 120-140 euros. This takes into account the price fluctuations in previous auctions and the fact that the coin has sold in the majority of instances in the past.