I've used this company:

https://www.startssl.com/

to obtain a free SSL certificate for one year, for my domain. Now the certificate is expired, and I'm trying to fix that, but their interface seems to be broken.

Does anyone have a website to recommend which works well, and where I could obtain an SSL certificate (with instructions and all that) which would be automatically renewed, and not cost too much (I'd pay say $5-10 a year)?
Well I finally bought this:

https://www.namecheap.com/security/ssl-certificates/domain-validation.aspx

"Comodo PositiveSSL", it costs less than $10 / year. But it is not renewable so I have to go through the same procedure again every year.

It looks like I'm going to get a free certificate from startSSL again, after all. I found my way around their interface.
The Comodo certificate still sits in my namecheap control panel, and hasn't been activated, nor tied to a domain, so I can use it whenever I want. But I don't see the advantage of it.