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: 200 euros.
2. Auction history: The coin has been auctioned 2 times in the past and sold on both occasions. This indicates interest and demand for the coin.
3. Average hammer price: 210 euros, which is the average price at which it has sold in previous auctions.
4. Condition: The coin has a condition rating of 80 (VF+), which is a good condition and may positively influence its value.
5. Average starting price in the past: 167.5 euros, which is lower than the current starting price, but the average hammer price is more relevant.

Given that the average hammer price is 210 euros and considering that the condition is good, an estimated maximum purchase price could be slightly above the average hammer price, but not too much, to avoid overpaying.

Therefore, an estimated maximum purchase price could be around 220 euros. This allows for some margin for competition in the auction, as the interest in the coin seems to be solid.

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 90 (NGC XF), 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, we can see that the coin has reached auction prices of up to 1000 euros in superior conditions (such as in 2018 with a condition rating of 100) and has had auctions in the range of 170 to 400 euros in conditions similar to the current one (condition rating of 85-90).

3. Average Auction Price: The average auction price for this coin is 204.53 euros, providing a good reference for the expected value.

4. Recent Trends: In the most recent auctions, the hammer prices have varied, but there are examples of auctions exceeding 300 euros in similar conditions.

5. Starting Price: The starting price is 100 euros, indicating that the seller expects a reasonable minimum price.

Based on these factors, an estimated maximum purchase price could be in the range of 300 to 400 euros, considering that the condition is good and there are precedents for auctions in that range. However, given the price history and trend, a reasonable maximum purchase price could be 350 euros.

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 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:
- The average hammer price for similar coins has been 139.48 euros.
- In previous auctions, we have seen hammer prices that varied considerably, but some relevant examples are:
- A coin with a condition of 80 was sold for 240 euros.
- Another with a condition of 70 was sold for 220 euros.
- A coin with a condition of 75 was sold for 180 euros.

3. Starting Price and Average Starting Price: The current starting price is 175 euros, which is higher than the average starting price of 81.41 euros. This suggests that there is an expectation for the coin to sell at a higher price.

4. Recent Trends: In the most recent auctions, hammer prices have been quite high, indicating a growing interest in coins of this condition.

Based on these factors, an estimated maximum purchase price could be in the range of 200 to 250 euros, considering that the condition is good and there is a history of hammer prices that supports this estimate. However, given the market interest and price trends, a reasonable maximum purchase price could be 250 euros.

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-), which indicates that it is in acceptable shape, but not of high quality. This generally affects the price, as coins in better condition tend to reach higher prices.

2. Auction History:
- The average hammer price for similar coins has been 497.52 euros.
- In previous auctions, coins with a similar condition (70) have had hammer prices that varied, but some examples are:
- 280 euros (2020-12-15)
- 220 euros (2019-03-14)
- 210 euros (2022-10-17)
- The trend shows that coins with a condition of 70 have reached hammer prices in the range of 150 to 280 euros in recent auctions.

3. Starting Price and Average Starting Price:
- The current starting price is 125 euros, which is relatively low compared to the average hammer price.
- The average starting price for similar coins is 280.37 euros.

4. Demand and Auction Frequency: The coin has been auctioned 99 times, with a high sales percentage (88 out of 99). This suggests that there is consistent interest in this coin, which may increase its value at auction.

Based on these factors, an estimated maximum purchase price could be in the range of 250 to 300 euros, considering that the condition is a limiting factor and that the starting price is relatively low. Therefore, a reasonable maximum purchase price could be 300 euros.

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 30 (BC+), which indicates that it is not in the best condition. This generally reduces its value compared to coins in better condition.

2. Historical Prices: By looking at the auction prices of coins with similar conditions, we can see that the highest auction price for a coin with a condition of 30 was 100 euros (at the auction on 2019-12-10). However, there are coins with higher conditions that have sold for significantly higher prices.

3. Average Auction Price: The average auction price for this coin is 477.93 euros, but this includes coins in better condition.

4. Starting Price and Average Starting Price: The current starting price is 225 euros, and the average starting price is 267.21 euros. This suggests that the market is willing to accept a higher starting price than the current one.

5. Sales Trends: The coin has been auctioned 35 times, of which 32 have been sold, indicating good demand.

Taking all these factors into account, an estimated maximum purchase price could be in the range of 100 to 200 euros, given that the condition is not high and the highest auction price for a similar condition was 100 euros. However, if there is interest in the coin and considering the starting price, a reasonable maximum purchase price could be approximately 150 euros.