Script to email all Craigslist posts from given categories to you from the authors emails, so you can simply reply to the ones that interest you.

craigmailer.php

<?php // CraigMailer
$to_email    = 'lance@lrvick.net';                   // the email all postings should be sent to
$sqlite_file = 'craigmailer.sqlite';                 // sqlite file location
$city        = 'orlando';                            // city to watch (as per cl subdomain)
$topics      = array('cpg','sad','web','sof','eng'); // topics (three char topics as used in cl urls)

$handle = sqlite_open($sqlite_file, 0666, $sqlite_error) or die("Could not open database");
$query = sqlite_query($handle,"SELECT name FROM sqlite_master WHERE type='table'");
if (!sqlite_fetch_array($query)){
  sqlite_query($handle,"CREATE TABLE posts (id INTEGER(15) PRIMARY KEY NOT NULL,timestamp DATETIME NOT NULL,topic CHAR(4) NOT NULL, subject CHAR(255) NOT NULL, email CHAR(255) NOT NULL, body TEXT, mail_sent INTEGER(1) DEFAULT 0 NOT NULL);")
    or die("Error in query: ".sqlite_error_string(sqlite_last_error($handle)));
}
foreach ($topics as $topic) {
  $watch_url = "http://".$city.".craigslist.org/".$topic;
  $rss = file_get_contents($watch_url."/index.rss");
  preg_match_all('#'.$watch_url.'/\d+\.html#', $rss, $urls_loop);
  $urls = array_unique($urls_loop[0]);
  foreach ($urls as $url) {
    $url_path = parse_url($url, PHP_URL_PATH);
    $url_pathinfo = pathinfo($url_path);
    $id =  $url_pathinfo['filename'];
    $query = sqlite_query($handle,"SELECT * FROM posts WHERE id='$id'");
    if (!sqlite_fetch_array($query)){
      $page = file_get_contents($url);
      preg_match('#<div id=\"userbody\"?>(.*)#msU', $page, $body);
      preg_match('#Date: (.*) EDT#msU', $page, $timestamp);
      $timestamp = explode(',',str_replace(' ','',$timestamp[1]));
      $timestamp = $timestamp[0]." ".date( 'H:i:s', strtotime($timestamp[1]));
      preg_match_all('#[-+.\w]+((\@)|(.{,4}at.{,4}))[-+.\w]+\.[[:alpha:]]{2,3}#', $page, $emails);
      preg_match('#mailto\:(.*?)\?#', $page, $mailto);
      preg_match('#<h2>(.*)</h2>#', $page, $header);
      if (end($emails[0])) {
        $email = html_entity_decode(end($emails[0]));
      } elseif (end($mailto)) {
        $email = html_entity_decode(end($mailto));
      }
      $body = sqlite_escape_string($body[1]."<a href="">$url</a>");
      $subject = sqlite_escape_string($header[1]);
      if ($id && $timestamp && $topic && $subject && $email && $body) {
        $query = "INSERT INTO posts (id,timestamp,topic,subject,email,body) VALUES ('$id','$timestamp','$topic','$subject','$email','$body');";
        sqlite_query($handle,$query) or die("Error in query: ".sqlite_error_string(sqlite_last_error($handle)));
        echo "\n Added - ".$id." | ".$timestamp." | ".$topic." | ".$subject." | ".$email."\n";
      }
    }
  }
}
$query = sqlite_query($handle,"SELECT * FROM posts WHERE mail_sent='0';") or die("Error in query: ".sqlite_error_string(sqlite_last_error($handle)));
while ($post = sqlite_fetch_array($query)){
  $id = $post[0];
  $timestamp = $post[1];
  $topic = $post[2];
  $subject = "cl/".$topic." ".$post[3];
  $email = $post[4];
  $body = $timestamp."\n ".$post[5];
  $headers  = 'From: '.$email."\r\n";
  $headers .= 'Subject: '.$subject."\r\n";
  $headers .= 'Reply-To: '.$email."\r\n";
  if (mail($to_email, $subject, $body, $headers)){
    sqlite_query($handle,"UPDATE posts SET mail_sent = '1' WHERE id='$id'") or die("Error in query: ".sqlite_error_string(sqlite_last_error($handle)));
  }
}
?>