Can I be notified when changes have been made to a perticular webpage?

Factual Questions
1

Every Thursday morning a website that sells tobacco pipes puts out new pipes that sell very quickly. The time the page is updated with new pipes varies. Is there a program I can use that will send me an email the moment the page is updated rather than refreshing the page constantly to see if it’s up yet?

2

Here is an article “Ten free ways to keep track of website changes” that might be helpful:

http://downloadsquad.switched.com/2010/02/08/10-free-ways-to-keep-track-of-changes-to-any-website-without-rss/