ebay is a trust worthy company in my experience. Things to know:1- You are not charged anything by ebay as a buyer by ebay. You only pay per the description in the auction for the product and shipping.2- As a seller you are charged listing fees and final valuation fees.3- Never give personal information to somebody requesting it. There are scammers on ebay that will write to you either saying they are with ebay or say they need your personal information for some other reason. They are looking to steal your identity. Do not give them your personal information. Be VERY careful when responding to emails that look like they are from ebay. If they are asking you to respond with personal information including telling them your user name of password tell them to pound sand and report them to ebay.4. For payment, use PAYPAL (www.paypal.com). It is a secure site owned by ebay.com. You set up a user account and pay for ebay items through the site to protect your personal information.5. ebay has really, REALLY poor customer service so be a savvy user of the platform.Hope this helps!
If you sell it will cost you fee s, if you buy you only pay for what you buy, no fees.They are asking for those details to verify who you are and your age.