To estimate a maximum purchase price for the coin that will be auctioned, we will consider several factors, including the starting price, the condition of the coin, and the hammer prices of previous auctions for coins with similar conditions.

### Relevant Data:
- Starting Price: 30 euros
- Condition of this Coin: 95 (EF+)
- Previous Prices for this Coin:
- In previous auctions, coins with a condition of 95 have had hammer prices that varied, but some examples are:
- 60 euros (2020-12-14)
- 42 euros (2020-07-08)
- 62 euros (2020-11-03)
- 70 euros (2020-10-13)
- 190 euros (2020-12-14, but with lower condition)

### Analysis:
1. Starting Price: 30 euros is a low entry price, which may attract more bidders.
2. Condition: A condition of 95 (EF+) is high, suggesting that the coin is in very good shape and may reach a higher hammer price.
3. Previous Hammer Prices: The hammer prices for coins with similar conditions have been significantly higher than the starting price. For example, the highest hammer price for a coin with a condition of 95 was 190 euros.

### Estimation of Maximum Purchase Price:
Given that the hammer price for coins of similar condition has been up to 190 euros, and considering that the starting price is 30 euros, a reasonable maximum purchase price could be 20-30% higher than the lowest observed hammer price for coins of similar condition.

Therefore, an estimated maximum purchase price could be in the range of 80 to 100 euros. This allows for competition in the auction, as other bidders may also be interested in the coin.

### Conclusion:
Estimated maximum purchase price: 100 euros.