gistfile1.js

var http = require('restler'),
    jsdom = require('jsdom');

function getPrice(html) {
  var start = html.search(/\$\d+/);
  if (start === -1) {
    return -1;
  }
  return +html.substring(start + 1, html.substring(start + 1).search(/\D+/) + 1);
};

function parse(html) {
  jsdom.env({
    html: html,
    done: function(err, window) {
      var listings = [];
      [].slice.call(window.document.getElementsByClassName('row')).forEach(function(el) {
        var price = getPrice(el.querySelector('.itemph').innerHTML),
            link = el.querySelector('a'), linkHref, linkText;
        if (price === -1) {
          return;
        }
        linkHref = link.href;
        linkText = link.innerHTML;
        listings.push({
          text: linkText,
          href: linkHref,
          price: price
        });
      });
      console.log(listings.filter(function(list) {
        var text = list.text.toLowerCase(),
            bed = /2[-\s]*(bed|br|bedroom)/,
            bath = /2[-\s]*(bath|ba|bathroom)/
        return list.price < 4000 && text.search(bed) !== -1 && text.search(bath) !== -1;
      }));
    }
  });
};

http.get('http://sfbay.craigslist.org/sfc/apa/').on('complete', parse);