Based on the provided data, we can observe that the coin in question has had an average auction closing price of 106.53 euros in previous auctions. Additionally, its current condition is estimated at 30 (BC+).

Considering that the average closing price has been 106.53 euros and the current condition is 30 (BC+), we could estimate a maximum purchase price around 120-130 euros. It is important to note that this is just an estimate and the final price may vary depending on factors such as demand at the auction and buyers' interest at that specific time.