Created by Rent A Hacker
<?php
    //modify the following

    $username = "username"; //the eBay username
    $password = "password"; //the eBay password

    $item = 300712344201; //the item number
    $bid =  0.01; //the  bid value in the item's currency

    //do not modify below

    //query the sign-in page
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($curl, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows NT 6.1; rv:15.0) Gecko/20100101 Firefox/15.0.1");
    curl_setopt($curl, CURLOPT_RETURNTRANSFER,1);
    curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($curl, CURLOPT_COOKIEFILE, "cookies.txt");
    curl_setopt($curl, CURLOPT_COOKIEJAR, "cookies.txt");
    curl_setopt($curl, CURLOPT_URL,"http://signin.ebay.com/aw-cgi/eBayISAPI.dll?SignIn");
    $ret = curl_exec ($curl);
    curl_close ($curl);

    //sign-in
    $post = "MfcISAPICommand=SignInWelcome&siteid=0&co_partnerId=2&UsingSSL=0&ru=&pp=&pa1=&pa2=&pa3=&i1=-1&pageType=-1&userid={$username}&pass={$password}";

    $curl = curl_init();
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($curl, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows NT 6.1; rv:15.0) Gecko/20100101 Firefox/15.0.1");
    curl_setopt($curl, CURLOPT_RETURNTRANSFER,1);
    curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($curl, CURLOPT_POST, 1);
    curl_setopt($curl, CURLOPT_POSTFIELDS,$post);
    curl_setopt($curl, CURLOPT_COOKIEFILE, "cookies.txt");
    curl_setopt($curl, CURLOPT_COOKIEJAR, "cookies.txt");
    curl_setopt($curl, CURLOPT_REFERER, "http://signin.ebay.com/aw-cgi/eBayISAPI.dll?SignIn");
    curl_setopt($curl, CURLOPT_URL, "http://signin.ebay.com/aw-cgi/eBayISAPI.dll");
    $ret = curl_exec ($curl);
    curl_close ($curl);

    if (strpos($ret, "Member id {$username}") === FALSE) {
        echo "Failed signing in.\r\n";
    } else {
        echo "Success signing in.\r\n";
    }

    //place the inital bid
    $url = "http://offer.ebay.com/ws/eBayISAPI.dll?MakeBid&item={$item}&maxbid={$bid}";

    $curl = curl_init();
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($curl, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows NT 6.1; rv:15.0) Gecko/20100101 Firefox/15.0.1");
    curl_setopt($curl, CURLOPT_RETURNTRANSFER,1);
    curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($curl, CURLOPT_COOKIEFILE, "cookies.txt");
    curl_setopt($curl, CURLOPT_COOKIEJAR, "cookies.txt");
    curl_setopt($curl, CURLOPT_URL, $url);
    $ret = curl_exec ($curl);
    curl_close ($curl);

    preg_match_all('/(?:value="([-0-9a-zA-Z]*)" *)?name="stok"(?: *value="([-0-9a-zA-Z]*)")?/', $ret, $regs);
    $stok = $regs[1][0];

    preg_match_all('/(?:value="([-0-9a-zA-Z]*)" *)?name="uiid"(?: *value="([-0-9a-zA-Z]*)")?/', $ret, $regs);
    $uiid = $regs[1][0];

    if (($stok) && ($uiid)) {
        echo "Success placing initial bid.\r\n";
    } else {
        echo "Failed placing initial bid.\r\n";
    }

    //confirm the bid
    $url = "http://offer.ebay.com/ws/eBayISAPI.dll?MfcISAPICommand=MakeBid&maxbid={$bid}&quant=1&mode=1&stok={$stok}&uiid={$uiid}&co_partnerid=2&user={$username}&fb=0&item={$item}";

    $curl = curl_init();
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($curl, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows NT 6.1; rv:15.0) Gecko/20100101 Firefox/15.0.1");
    curl_setopt($curl, CURLOPT_RETURNTRANSFER,1);
    curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($curl, CURLOPT_COOKIEFILE, "cookies.txt");
    curl_setopt($curl, CURLOPT_COOKIEJAR, "cookies.txt");
    curl_setopt($curl, CURLOPT_URL, $url);
    $ret = curl_exec ($curl);
    curl_close ($curl);

    if (strpos($ret, "you're the first bidder") === FALSE) {
        echo "Failed placing final bid.\r\n";
    } else {
        echo "Success placing final bid.\r\n";
    }

    //for testing
    //$fh = fopen("testhtml.html", 'w');
    //fwrite($fh, $ret);
    //fclose($fh);
?>