The method to view seller information on eBay is as follows:

1. Open the eBay website and log in to your account.

2. Enter the name of the product you want to buy in the search bar and search.

3. On the search results page, find the product you are interested in and click the product name to enter the product page.

4. After entering the product page, you can see the seller's user name in the upper right corner of the page. Click the user name to enter the seller's information page. You can also find buttons such as "Seller Information" or "Seller Details" on the product page and click to enter the seller's information page.

5. On the seller's information page, you can see the seller's detailed information, including the seller's rating, feedback, historical sales records, etc.

By viewing the seller's information, you can better understand the seller's reputation and sales situation, so as to better decide whether to purchase the product.