may i ask what happens after 180 days?
Newly opened accounts is not allowed to sell something on Ebay. If you want to sell something on Ebay, your account age needs to be older.
you actually can sell anything since the first day of registration. The point is, if your item is high risk, you can be suspend without warnings.
And because of that you should start with low risk items, no matter if your account was created yesterday or 180+ days ago.
If there is no selling history at all on "aged" (180+) account, it will be treated like new account.