Here are the steps to check the transaction price on eBay:

1. Open the eBay website and log in to your account. If you don't have an account, you need to register one first.

2. Enter the name of the item you want to find the transaction price for in the search bar at the top of the eBay homepage.

3. On the search results page, select the "Sold Items" filter option. This will display all completed sales and list their transaction prices.

4. On the results page, you can see detailed information such as the title, transaction price, seller information and date of each sold item. You can sort by various indicators such as transaction price, time, seller, etc.

Note: If you have not sold any items on eBay, you will not be able to view sold items. In addition, some sellers may hide the transaction price, so you cannot view the specific transaction price of the item.