Not always.
If you buy from a private seller with a no returns policy, you can return the item if, for example, it has marks or damage that are not mentioned in the listing.
If you don't like it, it is not quite the colour you expected, is flimsier than you thought it would be, or you simply change your mind, you are not covered.
Is this a hypothetical question or do you have an item you would like to return?
"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)
