How to scrap Rightmove Agents. Ill probably need Fax numbers and website addresses. Planning B

rightmove.co.uk.rb

# encoding: UTF-8

# MIT LICENSE (c)2012 Nelson Kelem [nelson at ilinkoln.org]
# Date: 30/12/2012
# How to scrap Rightmove Agents
# Ill probably need Fax numbers and website addresses
# Planning B
# TODO: Write data to JSON, YAML or CSV

require 'nokogiri'
require 'open-uri'
require "yaml/store"
# require "capybara"

# Set the Yaml engine you like ['psych', 'syck']
# YAML::ENGINE.yamler = 'psych'

# 
# I dont think this is the efficient way to loop. But it works
# Show me some refactors and lets see how it turns out
# CITY = %w[ London Greater-London Manchester Greater-Manchester ]
# 

@url       = "http://www.rightmove.co.uk/estate-agents/London.html" # Maybe use  CITY.each {}
@data      = Nokogiri::HTML(open(@url))
@last_page = @data.at_css('div#sliderBottom ul.items li:last-child a').text.to_i

File.open("RightMoveLondonAgents.yml", "w:UTF-8") do |io| 
  i = 0
  z = 0
  io.puts "---\nagencies:"
  while i < @last_page
  if i <= 1
    data = @data
  else
    data = Nokogiri::HTML(open(@url + '?index=' + z.to_s))
  end
  

  @agents  = data.css('ol#summaries li').each do |li|  
    
    li.css('div.photos').each do |agent|
      io.puts "\tagent:"
      
      # Logo image URL
      io.puts "\t\tlogo_url: \"#{agent.at_css('a.photo img')['src']}\""
      
      # Agent details
      @details = li.css('.details').each do |detail|
        io.puts "\t\tbranch_name: \"#{detail.at_css('h2.branchname a').content}\""
        io.puts "\t\ttelephone: #{detail.at_css('p.telephone').text.to_s.gsub(/[^0-9]/, '')}"
        io.puts "\t\tdescription: \"#{detail.at_css('p.description').text.to_s.strip.gsub(/\n+/, ' ').squeeze}\""
      end
      
      # Type of business specialisation: Sales or Lettings
      @specialty = agent.css('div.channels').each do |sp|
        if sp.at_css('div.onechannel')
          io.puts "\t\tspecialising_in: \"#{sp.text.strip} \""
        else
          io.puts "\t\tspecialising_in: \"#{sp.at_css('div:first-child').text.strip} & #{sp.at_css('div:last-child').text.strip}\""
        end
      end
      io.puts "\n"
    end
    

  end
  
  i += 1
  z += 20
  
  end
end #end io

Problem with this approach is Rightmove will only let you run through the website 9.times at the speed your scripts query their servers. Times out and I think its trivial to make the script sleep for 2 minutes then continue if the pages are more than 9