Everybody is cheaper than Verisign. There are dozens of SSL certificate providers recognized by browsers. GeoTrust and their many resellers, RapidSSL, etc. GoDaddy resells for a couple of different SSL providers, and they offer a chained certificate for practically free. It's what we use, and we've never had anyone hesitate to shop with us (chained certificates have a slightly longer chain of trust, since you've got a third party in the chain...but no big deal...nobody understands how that works, anyway, and the browser doesn't complain about it as long as you configure the server correctly).
GeoTrust because I don't really care about certification of anything other than domain control; you get your certs fast (so long as you have your email address in the whois) and you can get deals depending on which reseller you go through.