I did a search and didn’t find this posted. I was looking for a renewal on my BitDefender and came across this deal on NewEgg. It’s $119.99 – $90 coupon = $29.99 with free shipping.
Coupon code: EMCRHBJ75
It says the coupon is good through Monday.
Hopefully this helps someone.
I am assuming you can upgrade to 2018, but maybe someone can confirm that? Thanks.