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 80 (MS+), indicating 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 96.18 euros.
- In previous auctions, coins with a similar condition (80) have reached hammer prices that varied, but some examples are:
- 60 euros (2020-09-17)
- 60 euros (2019-12-10)
- 65 euros (2019-05-22)
- 82 euros (2020-04-29)
- 90 euros (2023-04-19)

3. Starting Price: The starting price is 60 euros, which is a good starting point.

4. Recent Trends: In the most recent auctions, the hammer price has shown a trend of being higher, especially for coins in good condition.

Based on these factors, an estimated maximum purchase price could be in the range of 90 to 110 euros, considering that the average hammer price has been 96.18 euros and that the coin's condition is good.

Therefore, a reasonable maximum purchase price could be 100 euros.