To estimate a maximum purchase price for the coin in question, we can analyze the provided data:

1. Current starting price: 60 euros.
2. Average starting price in previous auctions: 73.86 euros.
3. Average hammer price in previous auctions: 92.94 euros.
4. Hammer price history: Hammer prices have varied, with some reaching up to 160 euros in the past.

Since there is no information about the condition of the current coin, it is difficult to make an accurate estimate. However, we can consider the following points:

- The coin has had an average hammer price of approximately 92.94 euros, suggesting that, under normal conditions, it could be expected to sell for a price close to this.
- In previous auctions, the hammer price has been significantly higher (up to 160 euros), indicating that there is potential for a higher selling price depending on demand and condition.
- The coin has a starting price of 60 euros, which is lower than the average starting price of previous auctions (73.86 euros).

Based on this data, an estimated maximum purchase price could be between the average hammer price (92.94 euros) and the highest recorded price (160 euros). However, since there is no information about the condition, it is wise to be conservative in the estimation.

Maximum purchase estimate: 100 euros.

This price allows for a margin of safety, considering that the hammer price can vary depending on demand and other factors in the auction.