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 (EF-), 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 145.61 euros.
- In previous auctions, coins with a similar condition (85) have reached hammer prices that varied, but some examples are:
- 220 euros in September 2020.
- 380 euros in March 2021.
- 170 euros in January 2022.
- 90 euros in December 2023.

3. Starting price: The starting price of 110 euros is a good indicator of the seller's expectations, but it does not necessarily reflect the final hammer price.

4. Sales trends: The coin has been auctioned 94 times, with an 88% sell-through rate, suggesting there is consistent interest in this coin.

5. Recent hammer prices: Recent hammer prices for coins of similar condition have ranged from 90 to 380 euros, indicating a wide range depending on demand at the time of the auction.

Based on these factors, an estimated maximum purchase price for this coin could be in the range of 150 to 250 euros. This is based on the historical hammer prices for coins of similar condition and the demonstrated interest in previous auctions. However, it is important to note that the final price may vary depending on competition in the auction and demand at that specific moment.