ps4-oferta.rb

#!/usr/bin/ruby

require 'rubygems'
require 'open-uri'
require 'nokogiri'

SEARCH_URL = 'http://www.ofertaesperta.com/?ContentViewMode=Search&Search=ps4'

doc = Nokogiri::HTML(open(SEARCH_URL))
rows = doc.css('.oferta-title h4').select { |h4| h4.text =~ /Console/ }

prices = []

rows.each do |row|
  div = row.ancestors('.top-note').first
  prices << div.css('.preco').text().strip unless div.nil?
end

system "notify-send 'Menor Preço:' '#{prices.sort.first}'"