Glad you're making the move to a more secure site!
You can find pricing on our SSL's on our site here: https://www.godaddy.com/web-security/ssl-certificate.
Of course, you can always call our 24/7 Customer Service and Sales line to get the best pricing available to you.
Hope this helps!
If you don't wish to pay for SSL. You can obtain it for FREE and install it yourself in GoDaddy.
Below, I've explained how I did that and I hope you find it useful. Please note, I have a shared deluxe hosting package so you may not have the option to manage SSL certificates if you're on a different hosting package.