Based on the data provided, we can observe that the coin has had an average auction closing price of 148.87 euros in previous auctions. Additionally, the current condition of the coin is 90 (EBC).

Considering that the coin will be auctioned in the upcoming days and has performed well in previous auctions, we could estimate a maximum purchase price around 200-250 euros. Given that the average auction closing price has been 148.87 euros and the condition is high, it is reasonable to expect that the closing price in the next auction could exceed 200 euros.

It is important to consider that the final auction price will depend on several factors, such as the demand at that specific moment, the competition from other bidders, and the willingness of buyers to pay a higher price for this particular coin.