To estimate a maximum purchase price for the coin in question, let's consider the following factors:

1. Starting price: 1500 euros.
2. Average hammer price: 1600 euros.
3. Current condition: 95 (S/C-), which is good condition, although lower than the condition of 100 from the previous auction.
4. Historical data: In the previous auction, the coin was estimated at 1200 euros and sold for 1600 euros, with a condition of 100.

Since the current condition is slightly lower than that of the previous auction, this could influence the price. However, the starting price and the average hammer price are good indicators of demand and interest in the coin.

Taking all these factors into account, an estimated maximum purchase price could be around 1500-1600 euros, considering that the average hammer price in the previous auction was 1600 euros and that the current condition is good, although not as high as the previous one.

Therefore, a reasonable maximum purchase price could be 1600 euros.