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

1. Current Condition: The coin has a condition of 70 (VF-), which is lower than the conditions of previously auctioned coins (75). This could influence the price, as a lower condition generally translates to a lower price.

2. Previous Prices:
- In the December 2020 auction, the coin sold for 200 euros, which was both the starting price and the final price.
- In the May 2023 auction, the coin sold for 310 euros, although the starting price was 200 euros. This indicates an increase in interest or value of the coin in the market.

3. Average Hammer Price: The average hammer price for this coin is 255 euros, which can serve as a good indicator of the current market value.

4. Market Trends: Since the coin had a higher hammer price in the most recent auction, this suggests that interest in the coin may be increasing.

Taking these factors into account, an estimated maximum purchase price could be between the average hammer price (255 euros) and the most recent highest hammer price (310 euros). However, since the current condition is lower than previous ones, it is reasonable to adjust downwards.

Therefore, an estimated maximum purchase price could be around 280 euros. This reflects a balance between the increasing interest in the coin and its current condition.

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+), indicating that it is in quite good shape. This is important because coins in better condition tend to fetch higher prices.

2. Auction History:
- The average hammer price for this coin has been 188.08 euros.
- In previous auctions, hammer prices for coins with a similar condition (80) have varied, but there are examples where they have sold for prices close to 200 euros or more.
- For instance, in the auction on January 31, 2023, a coin with a condition of 80 was hammered down at 240 euros.

3. Starting Price and Average Starting Price:
- The current starting price is 100 euros, which is relatively low compared to the average hammer price.
- The average starting price has been 113 euros, suggesting that the current starting price is competitive.

4. Market Trends: Given that the coin has been auctioned 54 times and has a sell-through rate of 90.74% (49 out of 54), this indicates consistent demand.

Based on these factors, an estimated maximum purchase price could be between 220 and 250 euros, considering that the condition is good and there are precedents for sales in that range. This also takes into account the possibility that some bidders may be willing to pay more for a coin in good condition.

To estimate a maximum purchase price for the coin in question, we can analyze the provided data and consider 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 in a higher range compared to coins with lower conditions.

2. Auction History:
- The average hammer price from previous auctions is 279.29 euros, indicating that, in general, coins of this reference tend to sell for a considerably higher price than the starting price.
- The last auction in which a coin with a similar condition (80) was sold had a hammer price of 575 euros, which is a strong indicator that the market is willing to pay high prices for coins in good condition.

3. Starting and Hammer Prices:
- The current starting price is 150 euros, which is quite low compared to previous hammer prices. This could indicate a good buying opportunity.
- Previous hammer prices for similar conditions (75-85) have reached up to 570 euros, suggesting that the hammer price could be significantly higher than the starting price.

4. Sales Trends: The coin has been auctioned 9 times, of which 7 have sold. This indicates good demand in the market.

Based on these factors, an estimated maximum purchase price could be in the range of 400 to 600 euros, considering that the condition is good and that the hammer price history supports this estimate. A more conservative price could be around 500 euros, as it is an intermediate value between the average hammer price and the price of the last successful auction.

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

1. Current Condition: The coin has a condition rating of 95 (EF+), indicating that it is in very good shape. This generally translates to a higher price compared to coins in lower conditions.

2. Auction History:
- The average hammer price for coins of this reference is 544.33 euros.
- In previous auctions, hammer prices have varied, but there are examples of coins with similar conditions that have sold for prices ranging from 400 to 1400 euros, depending on the condition and demand at that time.

3. Starting Price and Average Starting Price:
- The current starting price is 300 euros, which is below the average starting price of 430 euros. This could indicate a good buying opportunity if demand is high.

4. Sales Trends: The coin has sold in 9 out of the last 10 auctions, suggesting there is consistent interest in this coin.

5. Comparison with Previous Prices:
- The last auction with a condition of 95 had a hammer price of 1400 euros, suggesting that if demand is similar, the price could be in a high range.

Based on these factors, an estimated maximum purchase price could be in the range of 800 to 1200 euros, considering that the condition is high and there is a history of hammer prices that supports this estimate. However, the exact price will depend on the competition in the auction and the interest from other buyers.

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 70 (MS-). This is an important factor, as coins in better condition tend to reach higher prices.

2. Auction History:
- The average hammer price for coins of this reference is 493.89 euros.
- In previous auctions, hammer prices have varied significantly, ranging from 170 euros to 1900 euros, depending on the condition and other factors.

3. Starting Price and Average Starting Price:
- The current starting price is 100 euros, which is lower than the average starting price of 166 euros. This could indicate an opportunity to purchase at a lower price.

4. Sales Trends: The coin has been sold in 9 out of the last 10 auctions, suggesting there is demand for this coin.

5. Previous Estimates: In past auctions, the estimated price has been significantly higher than the current starting price. For example, in a 2020 auction, the estimated price was 400 euros, and the hammer price was 1900 euros.

Based on these factors, an estimated maximum purchase price could be in the range of 400 to 600 euros, considering that the condition is 70 and there is a history of hammer prices exceeding 500 euros. However, since the starting price is 100 euros, it may be possible to acquire it for a lower price, but the mentioned range reflects the potential value of the coin based on its condition and auction history.

Therefore, a reasonable maximum purchase price could be 500 euros.