There is another way. You look through the wanted ads and spot someone who wants to buy something you have to sell. You send them a message via the forum, or even their email address if they’ve bothered to add one to their ad or profile, then they ignore you. You wait 24 hours thinking you’re doing them a favour and send them another message. They ignore you some more.
My second pet source of happiness is the buyer who offers you 25% less than your asking price, which you think is reasonable, and you reply that they could meet you halfway for a deal, only to find they never contact you again.