I am trying to determine if I will be able to add an external classified service to my website. This service will allow me charge users for posting an item for sale. The free nor the upgraded Bravenet classified service does not do this (to my understanding). It's e-classified.net and it's fully hosted by them. Does anyone know if I will be able to added to my website?

Browser: Mozilla

You are perfectly free to use third party service providers in conjunction with your Bravenet hosting.

If the e-classifieds service is fully hosted in the same way as the Bravenet service then there should be no technical issues. Having said that the info on their site is very poorly written but that is how I interpret it.