sell out
No object
Be completely sold, with no stock left
Tickets sold out within minutes.
Usage
Also: 'We are sold out' (passive).
No object
Nothing follows the particle directly. You cannot say it with a direct object.
The particle: out
This verb belongs to the group ‘running to the end’.
Practise it
Add it to your daily practice or see every verb with out.
Further reading: sell out on Wiktionary (CC BY-SA).