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

2. Auction History:
- The average hammer price for similar coins is 496.09 euros.
- In the past, coins with similar conditions (around 80-90) have sold for prices that varied considerably, but some examples are:
- In 2014, a coin with a condition of 90 was hammered at 880.58 euros.
- In 2015, a coin with a condition of 90 sold for 648.28 euros.
- In 2020, a coin with a condition of 85 sold for 420 euros.

3. Starting Price and Average Starting Price: The current starting price is 200 euros, and the average starting price in the past has been 241.29 euros.

4. Sales Trends: Of the 18 times it has been auctioned in the past, 15 have sold, indicating good demand.

Based on this data, an estimated maximum purchase price could be in the range of 400 to 600 euros, considering that a condition of 80 is quite good, but it does not reach the level of higher conditions that have achieved significantly greater prices.

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

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

1. Starting Price: 150 euros.
2. Condition: The coin has a condition rating of 80 (MBC+), indicating that it is in good shape, which may increase its value.
3. Auction History: It has been auctioned 2 times in the past, of which it sold once and did not sell once. This suggests that there is interest in the coin, but also that there may be some resistance in the price.
4. Average Starting and Hammer Price: The average starting price is 135 euros and the average hammer price is 160 euros. This indicates that, generally, coins of this reference tend to sell around those prices.
5. Previous Hammer Price: In the 2014 auction, the coin sold for 160 euros, establishing a precedent for its value.

Given that the condition is good and the previous hammer price was 160 euros, an estimated maximum purchase price could be in the range of 160 to 180 euros, considering that interest in the coin may have increased since then and that the condition is favorable.

Therefore, an estimated maximum purchase price could be 170 euros. This allows for some margin for competition in the auction, but it is also based on historical data and the current condition 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: 650 euros.
2. Coin condition: 75 (MBC), which is a medium-good condition.
3. Auction history:
- In 2016, the coin was auctioned with a starting price of 1482.87 euros and was sold at the same price, indicating that the market valued that coin at that price at that time.
- In 2022, the same coin was auctioned with a starting price of 500 euros and was sold at the same price, suggesting that interest in that coin may have decreased or that the market was less active.

4. Average starting and final prices: The average starting price is 877.62 euros and the average final price is 991.44 euros, indicating that, in general, coins of this reference tend to sell above the starting price.

Given that the condition is the same as in previous auctions and considering the current starting price, an estimated maximum purchase price could be positioned between the average final price and the final price of the 2016 auction.

Therefore, an estimated maximum purchase price could be:

- Estimated range: Between 900 and 1100 euros.

This is based on the fact that the previous final price was 1482.87 euros, but also considering that the market may have changed and that the current starting price is 650 euros. A purchase price of around 1000 euros could be reasonable, given the history and condition of the coin.