Implements xkcd 576.
    Syntax: {command}

def cmd(send, _, args):
    """Implements xkcd 576.
    Syntax: {command}
    """
    apikey = args['config']['api']['ebayapikey']
    categories = get_categories(apikey)
    item = None
    while not item:
        item = get_item(choice(categories), apikey)
    send(item)