Based on the data provided, we can see that the coin in question has had an average auction closing price of 21.58 euros in previous auctions. Additionally, the current condition of the coin is 95 (EBC+), indicating that it is in quite good condition.

Considering that the average auction closing price has been 21.58 euros and the high condition of the coin, we could estimate a maximum purchase price around 25-30 euros. However, keep in mind that the final price in an auction can vary depending on demand and other factors, so it is important to pay attention during the auction to adjust your offer accordingly.