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

1. Condition of the coin: The coin has a condition rating of 85 (EBC-), indicating that it is in fairly good shape. This is important because coins in better condition tend to fetch higher prices.

2. Auction history:
- The average hammer price for similar coins in the past is 95.48 euros.
- In previous auctions, coins with a similar condition (85) have had hammer prices that varied, but some examples are:
- 60 euros (auction on 2020-11-10)
- 63 euros (auction on 2020-09-17)
- 140 euros (auction on 2019-03-14, although this coin had a condition rating of 95).

3. Starting price and estimates:
- The current starting price is 60 euros, which is relatively low compared to the average hammer price.
- The average starting price for similar coins is 72.14 euros.

4. Sales trends: The coin has been auctioned 106 times, of which it has sold 82 times. This indicates good demand and sustained interest in the coin.

5. Proximity of auctions: There are 3 auctions scheduled in the coming days, which may influence competition and, therefore, the final price.

Based on these factors, an estimated maximum purchase price could be in the range of 90 to 120 euros. This is based on the average hammer price and the condition of the coin. A price of 100 euros could be a reasonable target, considering it is a midpoint between the starting price and the average hammer price.