Please help me to buy services

hi, i am new here. i want to buy Netflix account from here but i don't know how to buy? i selected few seller but there are no options to buy from those sellers? can some one guide me how to buy services from here?
Also after 15 posts when send private messages to some seller, it do not show in my sent messages. what is problem?

I sell netflix accounts at low prices, contact me

Uhm I follow this

Go to market place and account selling, ADd them on IM and wait.