Given that the coin has a conservation rating of 70 (MBC-), which indicates good quality, and considering that this is the first time it is being auctioned, the starting price is set at 45 euros.

In general, coins in good condition tend to sell for a price higher than the starting price, especially if there have been no previous sales that could influence the perception of value.

Since there are no historical sales data for this particular coin, and considering that the average hammer price is 0, it is difficult to establish an exact price. However, based on the conservation and the starting price, an estimated maximum purchase price could be in the range of 70 to 90 euros, depending on the interest of collectors and the competition in the auction.

Therefore, an estimated maximum purchase price could be approximately 80 euros.