Bitdefender Total Security 2017 Multi Device (Mac, Windows, Android) 5 devices OR
Bitdefender Internet Security 2017 3 devices OR
Bitdefender Antivirus Plus 2017 3 devices
The Total Security option seems the best value obviously but you may not want the extra bells and whistles that provides which could be annoying. I've removed the tracking ID from the URL and the offer still works fine so it doesn't appear to rely on being targeted and in fact I've received the offer on 3 different emails including once again after I bought new licenses.
Bitdefender likes to automatically opt you in for 'autorenew' at the end of the 12 months 'for your safety and convenience'. The autorenew price is US$99.
If you cancel the autorenew at the end of the period, it immediately offer you the same product for US$65 as a special discount if you keep the autorenew on.
…whereas the real price of the product is regularly $25