ESET NOD32 Antivirus 2015 - 3 PCs $24.99 Newegg.com
NewEgg is the best place I have found to buy NOD32 and they are running a special.
ESET NOD32 Antivirus 2015 - 3 PCs $24.99
Antivirus & Antispyware
Advanced Memory Scanner
Portable Device Control
Use promo code EMCAWKR95 to reduce price from $59.99 to $24.99
Digital download, no shipping.
You can buy now and use when your current code expires.
I waited 3 months to install purchased activation code last time and had no issues.
EDIT: promotions expire 20/08/2015