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

1. Condition: The coin has a condition of 100 (MS), indicating that it is in excellent shape. This generally increases its value compared to coins in lower conditions.

2. Auction history:
- The average hammer price for similar coins has been 37.09 euros.
- In previous auctions, hammer prices for coins with similar condition (100) have reached up to 120 euros (in the case of an auction in 2019).

3. Starting price and previous prices:
- The current starting price is 18 euros, which is relatively low compared to previous hammer prices.
- The average starting price has been 24.16 euros, suggesting that the current starting price could be attractive to buyers.

4. Supply and demand: The coin has been auctioned 32 times, of which it has sold 23 times. This indicates good demand, although there is also a significant number of coins that have not sold.

Based on these factors, an estimated maximum purchase price could be between 50 and 70 euros, considering that the average hammer price has been 37.09 euros and that there are examples of previous auctions that have reached up to 120 euros.

Therefore, a reasonable maximum purchase price could be 65 euros.

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

1. Current Condition: The coin has a condition rating of 80 (MBC+), indicating that it is in relatively good shape. This suggests that its value should be above that of coins in worse conditions.

2. Auction History:
- The average hammer price for similar coins has been 53.44 euros.
- In previous auctions, coins with similar conditions (around 80) have reached hammer prices of up to 70 euros (in the case of a coin with a condition of 85).
- The most recent auction of a coin with a condition of 90 had a hammer price of 50 euros, indicating that value can vary significantly with condition.

3. Starting Price and Estimates:
- The starting price of 30 euros is reasonable, given that the average starting price for similar coins is 26.93 euros.
- The coin has been sold in the past at prices that varied, but the range seems to be between 9 and 70 euros, depending on the condition.

4. Market Trends: Since there are two auctions scheduled in the coming days, this could increase competition and, therefore, the hammer price.

Based on these factors, an estimated maximum purchase price for the coin with a condition of 80 (MBC+) could be in the range of 60 to 75 euros. This is based on the auction price history and the current condition, as well as the trend that prices may increase in competitive auctions.

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

1. Current Condition: The coin has a condition of 75 (MBC), which indicates that it is in quite good shape. This generally translates to a higher price compared to coins with lower conditions.

2. Auction History: By looking at previous hammer prices for coins with similar conditions (75), we can see that they have reached hammer prices of up to 95 euros (as in the auction on 2015-12-16).

3. Average Hammer Price: The average hammer price for this coin is 62.58 euros, which is also a good indicator of the expected value.

4. Starting Price and Average Starting Price: The current starting price is 45 euros, and the average starting price is 47.61 euros. This suggests that the starting price is reasonable and could attract bidders.

5. Recent Trends: In the most recent auctions, hammer prices have been in the range of 55 to 75 euros for similar conditions.

Taking all these factors into account, an estimated maximum purchase price for this coin could be around 80-90 euros. This is based on the historical hammer prices for coins of similar condition and the current state of the coin.

To estimate a maximum purchase price for the coin in question, we can consider several factors based on the provided data:

1. Current starting price: 45 euros.
2. Coin condition: 70 (MBC-), indicating an acceptable but not excellent condition.
3. Auction history: The coin has been auctioned 2 times in the past and sold on both occasions. This is a good indicator of demand.
4. Average starting and hammer price: The average starting price is 110.5 euros and the average hammer price is 139.5 euros. This suggests that, in general, coins of this reference tend to sell for significantly higher prices than the current starting price.
5. Previous hammer price: In the 2015 auction, the coin sold for 220 euros with a condition of 90, which is notably higher than the current condition.

Given that the current condition of the coin is lower than that of the previous auction, it is reasonable to adjust the estimated price downward. However, the fact that it has sold in the past and that the average hammer price is considerably higher than the current starting price suggests there is potential for a higher hammer price.

Taking all these factors into account, an estimated maximum purchase price could be in the range of 80 to 100 euros. This reflects a balance between the current condition and the price history, as well as the demand observed in previous auctions.

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 70 (VF-). This indicates that it is in an acceptable state, but not of high quality.

2. Historical Prices: By looking at the auction prices of coins with a similar condition (70), we can see that they have varied. For example:
- In 2020, a coin with a condition of 70 was auctioned for 60 euros.
- In 2019, another coin with the same condition sold for 36 euros.
- In 2021, a coin with a condition of 70 was auctioned for 30 euros.

3. Average Auction Price: The average auction price for this particular coin is 170.89 euros, but this includes coins of different conditions. Given that the condition of the coin in question is 70, it is likely that the actual auction price will be lower than this average.

4. Starting Price: The starting price is 18 euros, which indicates that the auctioneer expects moderate interest in the coin.

5. Market Trends: The coin has been auctioned 103 times, with a high percentage of sales (92 out of 103). This suggests that there is an active market for this coin.

Based on these factors, an estimated maximum purchase price for the coin could be between 50 and 80 euros, considering that it is a coin in VF- condition and that previous auction prices for similar conditions have been in that range.

Therefore, a reasonable maximum purchase price could be 70 euros.

To estimate a maximum purchase price for the coin in question, we can consider several factors based on the provided data:

1. Current Grade: The coin has a grade of 30 (BC+). This is relatively low compared to other coins that have been auctioned in the past, where some reached higher grades (for example, 70 or 80).

2. Previous Auction Prices: Looking at previous auction prices for coins with similar grades:
- In 2022, a coin with a grade of 30 was auctioned for 81 euros.
- In 2023, another coin with a grade of 80 was auctioned for 110 euros, indicating that coins in better condition can fetch higher prices.

3. Average Auction Price: The average auction price for this coin is 90.88 euros, suggesting that, in general, coins of this reference tend to sell for relatively high prices.

4. Auction Trends: Since this coin has been auctioned 16 times and all have sold, there is a consistent demand. This may influence the final auction price.

5. Starting Price: The starting price is 30 euros, which may attract more bidders, but the final price will depend on the competition in the auction.

Considering all these factors, an estimated maximum purchase price for this coin could be in the range of 70 to 90 euros. This is based on the average auction price and previous auction prices for coins with similar grades. However, since the grade is an important factor, it is likely that the price will be closer to the lower end of this range.

Therefore, a reasonable estimated maximum purchase price could be 80 euros.