No!
You will have to buy packaging to send items you sell.
I think some businesses may get an allowance for packaging but I am not sure if that is still a thing.
Private sellers have to buy their own postage bags, padded envelopes etc.
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)
