User-agent: psbot
Disallow: /

User-agent: Slurp
Crawl-delay: 5
Disallow: 

User-agent: msnbot 
Crawl-delay: 5

User-agent: *
Crawl-delay: 30
Request-rate: 1/20
Disallow: /buy_sh.php
Disallow: /buy_shb.php
Disallow: /buy_item.php