other argos.online sold for 1250$ according to 4.cn

[bingoo]

.Online has become the fastest to sell 100,000 domains in 3 months,
more and more websites use xxx.online instead of xxxonline.com.
It is more than 91,900,000 websites catched by google since the number is 17,900,000 of .xyz
.Online is becoming the most famous ntld.

 

[Silentptnr]

Also, I looked at the NameJet auction and they actually included some .online domains.
http://www.namejet.com/featuredauctions/liveauction