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

1. Current Condition: The coin has a condition of 75 (MBC), which indicates that it is in quite good shape. This generally translates to a higher price compared to coins in lower condition.

2. Auction History:
- The average hammer price for this coin in the past is 148.03 euros.
- In previous auctions, hammer prices have varied, but some have reached up to 340 euros under similar conditions.
- The last auction of this coin with a condition of 75 had a hammer price of 200 euros.

3. Starting Price: The current starting price is 150 euros, which is a good indicator of the seller's expectations.

4. Price Trends: Looking at the hammer prices in previous auctions, it seems there is a price range that can go from 65 euros to 340 euros, depending on the condition and demand at the time of the auction.

Given all this, an estimated maximum purchase price for this coin, considering its condition and price history, could be around 200-250 euros. This is based on the fact that the highest hammer price under similar conditions has been 340 euros, but also considering that the average hammer price is 148.03 euros.

Therefore, a reasonable maximum bid price could be 250 euros.