Prints out market item price.

def get_price(ctx, currency):
    """Prints out market item price."""
    appid = ctx.obj['appid']
    title = ctx.obj['title']

    item_ = Item(appid, title)
    item_.get_price_data(currency)

    click.secho('Lowest price: %s %s' % (item_.price_lowest, item_.price_currency), fg='green')