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 80 (MBC+), indicating that it is in quite good shape. This generally translates to a higher price compared to coins with lower conditions.

2. Starting Price and Average Prices: The starting price is 60 euros, and the average starting price in previous auctions is 73.44 euros, while the average hammer price is 127.64 euros. This suggests that, in general, coins of this reference tend to sell for above their starting price.

3. Sales History: The coin has been auctioned 36 times, of which it has sold 35 times. This indicates high demand and a good sales history, which can influence a higher hammer price.

4. Previous Hammer Prices: Looking at previous hammer prices for coins with a similar condition (80), we can see that they have reached hammer prices that vary, but some have reached 190 euros (in 2018) and 250 euros (in 2022). This suggests that there is significant potential for a high hammer price.

5. Recent Trends: In the most recent auction, a coin with a similar condition sold for 340 euros, indicating that the market may be on the rise.

Based on these factors, an estimated maximum purchase price could be in the range of 150 to 200 euros, considering that the condition is good and that the sales history supports a higher price. However, given the recent market behavior, a maximum purchase price of 200 euros could be a reasonable estimate.