Based on the data provided, we can observe that the coin in question has had a good auction history, with an average auction price of 108.41 euros. Additionally, its current condition is 95 (EBC+), which is quite high.

Considering that the coin will be auctioned in the coming days with a starting price of 90 euros, we can estimate a maximum purchase price based on the average auction price and the condition of the coin. Given the high condition and the average auction price of 108.41 euros, we could consider a maximum purchase price around 120-130 euros.

It is important to note that the final auction price may vary depending on the demand at that specific time, so it is advisable to stay alert during the auction to adjust the offer accordingly.