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

1. Current Condition: The coin has a condition rating of 70 (MS-), indicating that it is in an acceptable state, but not among the best qualities.

2. Auction History:
- The average hammer price for coins of similar condition (70) has been approximately 124.25 euros.
- In previous auctions, hammer prices for coins with a condition of 70 have varied, reaching up to 130 euros in 2020 and 135 euros in 2020.

3. Starting Price: The current starting price is 100 euros, which may influence bidder interest.

4. Price Trends: Observing previous hammer prices, it seems there is potential for the coin to sell above the starting price, especially if there is interest in the auction.

5. Market Factors: Since there are no auctions scheduled in the coming days, this could increase interest in this particular auction.

Taking all these factors into account, an estimated maximum purchase price could be around 130-140 euros, considering that this is a price that has been reached in previous auctions for coins of similar condition and that interest could be high.

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: 350 euros.
2. Coin condition: 80 (MBC+), indicating good preservation.
3. Auction history:
- It has been auctioned 3 times in the past, of which it has sold 2 times.
- The average starting price in previous auctions was 483.33 euros, and the average hammer price was 820.5 euros.
- In the December 2020 auction, the hammer price was 666 euros with similar preservation (80).
- In the March 2020 auction, the hammer price was 975 euros, although the condition is not specified.

4. Price trends: The hammer prices in previous auctions suggest that the coin may reach significantly higher prices than the current starting price.

Given that the average hammer price is 820.5 euros and considering that the condition is good (80), an estimated maximum purchase price could be in a range between the average hammer price and the highest observed hammer price.

Therefore, an estimated maximum purchase price could be approximately 800 to 900 euros. This is based on the price history and the good condition of the coin.

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

1. Condition: The coin has a condition rating of 75 (VF), which indicates that it is in fairly good shape, but not the best possible condition. This may influence the price, as coins in better condition tend to fetch higher prices.

2. Auction History:
- In the past, this coin has been auctioned 5 times, of which it has sold 4 times. This indicates a consistent interest in the coin.
- Previous hammer prices vary, but the highest was 1100 euros in a recent auction with a condition of 90. This suggests that there is an active market and that prices can fluctuate significantly depending on condition and demand.

3. Starting Price and Average Prices:
- The current starting price is 100 euros, which is relatively low compared to the average hammer price of 465 euros. This suggests that there could be considerable room for the hammer price to be higher than the starting price.

4. Comparison with Previous Prices:
- The average hammer price in previous auctions is 465 euros, which can serve as a good indicator of the current market value.

Taking all these factors into account, an estimated maximum purchase price could be in the range of 400 to 600 euros, considering that the condition is slightly lower than that of the highest auction and that the starting price is low. A hammer price of around 500 euros could be a reasonable target, given the sales history and current condition.

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

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

2. Auction History:
- The coin has been auctioned 11 times, of which it has sold 9 times. This indicates good demand.
- The average hammer price in previous auctions is 297.22 euros, suggesting that, in general, coins of this reference tend to sell for relatively high prices.

3. Previous Prices:
- Looking at previous hammer prices, we can see that they have varied considerably, from 135 euros to 700 euros, depending on the condition and other factors.
- The last auction in which a coin with a similar condition (70) was sold had a hammer price of 210 euros.

4. Starting Price and Average Starting Price:
- The current starting price is 100 euros, which is quite low compared to the average hammer price of 297.22 euros.

5. Price Trends:
- Since the average hammer price is significantly higher than the starting price, this suggests that there is potential for the coin to sell for a higher price.

Based on these factors, an estimated maximum purchase price could be in the range of 250 to 300 euros, considering that the condition is 70 and that the price history shows that coins in similar conditions have reached hammer prices in that range.

Therefore, a reasonable maximum purchase price could be approximately 280 euros.