Welcome to bricklink!
Used items do have lots of demand and do sell but take more time to list.
Also you have
"We are not responsible for lost or stolen items."
which you may want to change as the seller is fully responsible for the package
until tracking marks it as delivered
Come check out my newly opened store with only new parts. Curious do people prefer used parts over new parts? We just opened and will be growing over time and are excited to [...] (12 days ago, May 6, 2024, to New Stores)