Namecheap.com was our initial low cost SSL supplier (US$ 10/year). Now bought a PositiveSSL cert from https://comodosslstore.com/ at US$ 6.50/year when buying for 5 years. The 5 years is beneficial to us. Now we only need to execute the renew process once every five years. Note: the optional free upgrade to EV is a separate cert with a validness of only 1 year (not 5).