The most sold items sold for bitcoins are in my eyes, Cigarettes & Digital goods because they two things are getting sold a lot on the forum so I really think they also get sold a lot on other websites..
Digital things like VPN services, porn contents, anti-viruses and OS are few of most selling things with bitcoin payments. In physical goods, I have observed computer peripherals are fast moving with the bitcoin payment options. One thing here must be mentioned, computer graphics cards got very big hype due to introduction of bitcoin mining, not just with bitcoin payments.