use Komodo that is widely used and you can not beat the price.  If it is for a public facing web, you should use Komodo or use verisign for your assurance.  If it is for an internal process, and you have a window network you can make a local authoritive server on one of your boxes and generate your own requests as well.
 
good luck on your decision making. 

From: MSU Network Administrators Group on behalf of David Genord II
Sent: Fri 2/22/2008 8:26 AM
To: [log in to unmask]
Subject: Re: [MSUNAG] Certificates

Godaddy

David Genord II

On Fri, Feb 22, 2008 at 8:23 AM, Lee Duynslager <[log in to unmask]> wrote:
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> What's the most inexpensive place to get a one year certificate to set up
> SSL?
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> LD
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> Lee Duynslager
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> Information Technology Professional
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> Michigan State University
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> Department of Entomology
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> Department of Plant Pathology
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> North Central Plant Diagnostic Network
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> 517-432-5296
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>