To estimate a maximum purchase price for the coin in question, we can analyze the provided data, including the starting price, the average hammer price, and previous prices from similar auctions.

1. Current data of the coin:
- Starting price: €5000
- Condition: 95 (EF+)

2. Historical data:
- Average hammer price: €4704.59
- Previous prices from auctions of coins with similar conditions (around 90-95):
- They have sold for prices that vary significantly, with some hammer prices exceeding €10,000 for conditions of 90 and above.

3. Analysis of previous prices:
- In the past, coins with conditions of 90 have reached hammer prices of up to €17,000 or more, depending on demand and rarity.
- The last reference auction shows a starting price of €6000 and an estimated price of €12000, indicating that the market is willing to pay more for high-condition coins.

4. Maximum price estimation:
- Given that the condition of the coin is high (95), and considering the starting price and the average hammer price, a reasonable maximum purchase price could be in the range of €10,000 to €12,000.
- However, given the historical hammer price records for similar conditions, a maximum purchase price could be up to €15,000 if demand is high.

Conclusion: An estimated maximum purchase price for this coin could be between €12,000 and €15,000, depending on the competition in the auction and the interest from collectors.