Based on the data provided, we can observe that the coin has performed well in previous auctions, with final prices significantly exceeding the starting and estimated prices. The coin's condition is graded at 90 (Extremely Fine), which is quite high.

The average starting price in previous auctions has been 49.29 euros, while the average final price has been 130.02 euros. Considering the high condition of the coin and its strong performance in past auctions, we could estimate a maximum purchase price around 150-160 euros.

It is important to note that the final auction price will depend on various factors, such as demand at that specific moment, the number of interested parties in the coin, and its exact condition at the time of the auction. Therefore, it is advisable to closely monitor the auction and adjust the offer accordingly.