To estimate a maximum purchase price for the coin in question, we can analyze the provided data, especially the previous auction prices and the current condition of the coin.

1. Current Condition: The coin has a condition of 80 (MBC+), indicating that it is in quite good shape.

2. Previous Auction Prices:
- In previous auctions, the hammer prices for coins with a similar condition (80) have varied. For example:
- On 2022-10-19, a coin with a condition of 80 was auctioned for 140 euros.
- On 2022-11-16, another coin with a condition of 80 had no recorded hammer price, but the starting price was 110 euros.
- On 2023-12-13, a coin with a condition of 80 was auctioned for 190 euros.

3. Average Hammer Price: The average hammer price for this coin is 161.33 euros, which is also a good indicator.

4. Starting Price: The current starting price is 125 euros, which is reasonable compared to previous hammer prices.

5. Trends: Observing the trends, it seems that coins with a condition of 80 have had a hammer price range that can reach up to 190 euros in the highest case.

### Maximum Purchase Price Estimation
Given that the condition of the coin is 80 and considering the previous hammer prices, a reasonable maximum purchase price could be in the range of 180 to 200 euros. This is based on the highest recorded hammer price for a coin with a similar condition.

Therefore, an estimated maximum purchase price could be approximately 200 euros.