I would generally agree with Cheano's comments but there are a few exceptions!
About a year ago, i found a deal through fatwallet where Norton was offering a free upgrade to their NSW 2003 version as long as you had a previous version of NSW. There were two rebates i had to submit and i followed the instructions and got both of the rebate checks in the mail. Cost to me was .74 cents to mail in the two rebates. Can't say whether Norton will run that sweet deal again, but you never know... that's why i gave you the link to that website.