Where should I buy an SSL certificate for my site?
socialtistics: Most of the resellers out there are reselling Comodo certificates.  Comodo is probably the leader in terms of number of certificates issued and you can buy direct direct from them to save the middleman.  They offer two classes of certificates but both are essentially the same.  The difference is the amount of insurance Comodo provides you and the level of authentication you must go through to prove who you say you are.You can check them both out at:
http://www.instantssl.com/   (the lower end)
http://www.enterprisessl.com/   (the higher end)