Apple’s next operating system, Mac OS X Snow Leopard will be released this September. It will cost $29 ($49 for a family pack). If you purchased a qualifying Mac computer after June 8th 2009 then you can take advantage of Mac OS X Snow Leopard’s up-to-date program and only pay $9.95.
This offer is valid in Saudi Arabia from the Apple Europe website. You can visit this page and fill the form. You can pay using paypal and you will need proof of purchase, a scan of your receipt with the serial number will do. Thanks mohmedE for posting a comment about it. Thanks Sameer for trying it.
However if you prefer to order it from the United States or Canada and you have a US/Canada based address. I own a new MacBook Pro (US model) that I bought from itechia. I entered my MacBook Pro serial number in this form then checkout at the Apple Online Store where I used my MYUS,US-based, address (you can also try Aramex). The order is completed and now I only need to wait until the Snow Leopard release.