Doimed,
I usually check here:
http://www.fatwallet.com/GoDaddy-coupons/
which I'm sure you probably have.
They have a couple of renewal coupons, though I have no idea if they work or not.
I see a 10% off renewals (SAS10ORDER) and $15 off renewal purchase(s) of $75 or more (SAS15ORDER). There's also some 35% off coupons that don't say "new purchases" or a minimum dollar amount, but who knows...