Straying a bit from the original topic: For amazon price tracking I've used this and it's pretty good: http://camelcamelcamel.com/ http://camelcamelcamel.com/ (

Straying a bit from the original topic: For amazon price tracking I've used this and it's pretty good: http://camelcamelcamel.com/ http://camelcamelcamel.com/ (They apparently cover some other retailers too.)