They are probably just checking the user agent. This worked for me: 
#!/usr/bin/perl
use strict;
use warnings;
use LWP::UserAgent;

my $amazon_url = q{http://www.amazon.com/exec/obidos/ASIN/0394756673/r
+ef=nosim/bookreadersre-20};

my $ua = LWP::UserAgent->new;
$ua->agent('Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.3
+) Gecko/20070309 Firefox/2.0.0.3');

my $response = $ua->get($amazon_url);
my $page     = $response->content;

my $sought_string = q{offer-listing};
if ($page =~ /$sought_string/){
        print "Found it\n";
}
else {  
        print "No luck\n";
}

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In reply to Re: LWP simple question by imp
in thread LWP simple question by InterGuru

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