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

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

2. Auction History:
- In 2015, the coin was auctioned with a starting price of 15 euros and sold for 17 euros.
- In 2014, it was auctioned with a starting price of 60 euros and sold for 65 euros.
- Also in 2014, another auction had a starting price of 18 euros and sold for 26 euros.

3. Average Prices: The average starting price is 30.75 euros and the average final price is 59.5 euros. This suggests that, in general, coins of this reference tend to sell for a price higher than the starting price.

4. Price Trends: Looking at previous final prices, the highest price was 65 euros, while the lowest was 17 euros. However, the average final price is 59.5 euros, indicating that, overall, coins of this reference are reaching higher prices in recent auctions.

Given that the condition of the coin is good (75), and considering the final price history, an estimated maximum purchase price could be positioned in a range between the average final price and the highest recorded price.

Estimated Maximum Purchase Price: It could be reasonable to estimate a maximum purchase price of around 70 euros, taking into account the good condition and the price history.

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

1. Current Condition: The coin has a condition of 70 (VF-). This is an important factor, as coins in better condition tend to reach higher prices.

2. Starting Price and Average Hammer Price: The starting price is 70 euros, and the average hammer price in previous auctions is 142.39 euros. This suggests that, in general, coins of this reference tend to sell for a significantly higher price than their starting price.

3. Sales History: The coin has been auctioned 38 times, of which 36 have been sold. This indicates high demand and good interest in the coin.

4. Previous Prices: Looking at previous hammer prices for coins with a similar condition (70), we can see that they have reached hammer prices of up to 550 euros in the case of a condition of 95, and lower prices in conditions of 70 and 80, which range between 130 and 250 euros.

5. Recent Trends: In the most recent auctions, the hammer prices have been 250 euros and 280 euros for conditions of 75 and 80, suggesting that interest and prices are on the rise.

Based on these factors, an estimated maximum purchase price for the coin with a condition of 70 could be in the range of 200 to 250 euros, considering that the average hammer price is 142.39 euros and that there is potential for an increase based on demand and interest in the coin.

Therefore, a reasonable maximum purchase price could be 250 euros.

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

1. Current Condition: The coin has a condition rating of 75 (VF), indicating that it is in fairly good condition.

2. Previous Auction Prices: The average auction price for this coin is 187.33 euros. This suggests that, in general, buyers are willing to pay significantly more than the starting price.

3. Auction Prices for Similar Conditions: By observing the auction prices of coins with similar conditions (75 and 80), we can see that they have reached auction prices of up to 260 euros in recent auctions.

4. Auction Trends: The coin has been auctioned 51 times, of which 44 have been sold. This indicates good demand and consistent interest in the coin.

5. Starting Price: The starting price is 80 euros, which is relatively low compared to the average auction price.

Based on these factors, an estimated maximum purchase price could be in the range of 200 to 260 euros, considering that the highest auction price in recent sales for similar conditions has been 260 euros.

Therefore, a reasonable maximum purchase price could be 250 euros. This allows for some competition in the auction and aligns with previous auction prices.

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 80 (MS+), indicating that it is in quite good shape. This generally translates to a higher price compared to coins with lower conditions.

2. Previous Auction Prices: By looking at previous auction prices for coins with a similar condition (80-85), we can see that they have reached auction prices of up to 130 euros in recent sales.

3. Average Auction Price: The average auction price for this coin is 101.35 euros, providing a good reference for the expected value.

4. Recent Trends: In the most recent auctions, the auction prices have shown a trend of being in the range of 70 to 110 euros for similar conditions.

5. Starting Price and Average Starting Price: The starting price is 60 euros, and the average starting price is 64.78 euros. This suggests that the market is willing to pay a bit more than the starting price.

Taking all these factors into account, an estimated maximum purchase price for this coin could be around 120-130 euros, as this price reflects both the condition and recent price trends in similar auctions.