From the Netcraft newsletter:

“Most of the Certificate Authorities now understand that the market is a naturally price sensitive one, with a large number of sites simply going with the cheapest certificate on the premise that they all approximately do the same thing.

Over the last three years [1]Geotrust have, primarily through competitive pricing, garnered 10% of the market, and have become the role model competitor to Verisign in the way that Thawte had been before Verisign bought it.”

Get a SSL cert for $119 or check out these other low cost alternatives:

http://www.comodo.net/
http://www.entrust.com/
http://www.globalsign.com/