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

1. Starting Price: 30 euros. This is the initial price set for the auction.
2. Condition: The coin has a condition rating of 70 (VF-), indicating that it is in fairly good shape, although not the best possible condition. This may influence collectors' interest.
3. Auction History: The coin has been auctioned once in the past but did not sell, which may indicate that interest in this specific coin is limited. However, the fact that it has been auctioned suggests that there is some perceived value.
4. Average Hammer Price: There is no data on previous sales, making it difficult to establish an average hammer price.

Given that the coin has a starting price of 30 euros and considering its condition, an estimated maximum purchase price could be slightly higher than the starting price, but not too much, since it has not sold in the past.

Therefore, an estimated maximum purchase price could range between 30 and 50 euros, depending on collectors' interest at the time of the auction. A price of 40 euros could be a good benchmark, as it allows for some competition without exceeding the perceived value of the coin.

To estimate a maximum purchase price for the coin in question, we will consider several factors:

1. Current Condition: The coin has a condition rating of 80 (MS+). This is an important factor, as coins in better condition tend to reach higher prices.

2. Auction History:
- The average hammer price for similar coins has been 34.9 euros.
- In previous auctions, coins with a similar condition (80) have had hammer prices that varied, but some examples are:
- 4 euros (2020-07-02)
- 32 euros (2020-05-26)
- 25 euros (2019-04-24)
- 35 euros (2019-10-17)
- 50 euros (2020-02-12)
- The trend shows that the hammer price can vary significantly, but there are examples of sales exceeding 30 euros.

3. Starting Price and Average Starting Price:
- The starting price is 20 euros, and the average starting price is 23.59 euros. This suggests that the hammer price could be above these values.

4. Sales Expectations: Given that there are 2 auctions scheduled in the coming days, this could increase competition and, therefore, the hammer price.

5. General Trends: Historically, coins with a condition rating of 80 have had hammer price ranges that can reach up to 50 euros in some cases.

Based on these factors, an estimated maximum purchase price for this coin could be between 40 and 50 euros, considering that the condition is good and there is a price history that supports this estimate. However, it is important to be aware of the competition in the auction, as this can influence the final price.

To estimate a maximum purchase price for the coin in question, we will consider several factors:

1. Current Condition: The coin has a condition of 90 (EF), which indicates that it is in quite good shape. This generally translates to a higher price compared to coins in lower condition.

2. Previous Auction Prices: By looking at previous auction prices for coins with a similar condition (90 or 95), we can see that prices have varied. For example, in recent auctions, coins with a condition of 90 have reached hammer prices of up to 100 euros.

3. Average Hammer Price: The average hammer price for this coin is 47.27 euros, suggesting that, in general, buyers are willing to pay around this amount.

4. Recent Trends: In the most recent auctions, hammer prices have shown a trend of increasing, especially for coins in good condition. This may indicate a growing market.

5. Starting Price: The starting price is 30 euros, which is relatively low compared to previous hammer prices.

Taking all these factors into account, an estimated maximum purchase price for the coin could be between 80 and 120 euros, considering that the condition is good and there is an upward trend in hammer prices. A price of 100 euros could be a reasonable target, as it aligns with the hammer prices of coins in similar condition in the past.