My client has been using Thawte SSL certificates for some years which has been a reasonable investment, but upon renewing the prices seemed higher (maybe they are, maybe they aren't).
I've in the meantime used GoDaddy SSL certificate which are quite inexpensive (Starts at 30 bucks for a year).
What makes an SSL certificate worth more from one place versus another? I know the higher level encryption costs more, and some small bells and whistles add up, but they can be a few hundred a year.
So, how do you really buy one of these and know when you're spending too much?