This will be tricky. Soon people will copy your bot. Then neither of you will make sales because he searches for rare items. Maybe then you start putting bizar

This will be tricky. Soon people will copy your bot. Then neither of you will make sales because he searches for rare items. Maybe then you start putting bizarre titles and explain what you're selling in a field his bot doesn't worry about. And don't forget you can calculate how much money the bot has available from its Twitter feed, so you can price accordingly!