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

2. Previous Auction Prices: The average auction price for this coin has been 193.3 euros, suggesting that, in general, buyers are willing to pay close to this amount.

3. Price Trends: Looking at previous auction prices, we can see that in recent auctions, the coin has reached hammer prices of up to 520 euros (in 2016) and has had a price range that varies depending on condition and demand at the time of the auction.

4. Starting Price: The starting price is 160 euros, which may influence the final price, as buyers often consider the starting price as a reference point.

5. Analysis of Previous Sales: The coin has been auctioned 32 times, of which 31 have been sold. This indicates good demand and consistent interest in the coin.

Based on these factors, an estimated maximum purchase price could be in the range of 200 to 250 euros, considering that the condition is good and the average auction price is above 190 euros. However, given the price history and auction trends, a reasonable maximum purchase price could be approximately 240 euros.