Even with little inventory youd be surprised how well it could possibly sell! The biggest thing for me is knowing my demographic. My plushies sell best with teens-young adult age. Sometimes children, but bread and butter is teens and college age people.
Next biggest thing is dont under sell yourself. Unfortunately, you will come across people commenting on price. Just because they may make you feel down make sure you have a proce youd be comfortable with making customs for. As i have a lot of custom orders that way.
Other than that, just be yourself. Be open, honest, and by engaging people in conversation youre more often to secure a sale.