Can I be convicted of conspiracy and possession for sales without any actual drugs or drug-related paraphernalia being found?

Without some actual drugs in your possession – constructive or actual – you cannot be convicted of a possession charge. However, you can at least be charged with conspiracy, which is simply an agreement with an act in furtherance of the object of the agreement. These cases depend on the facts and that is why it is important to speak with skilled criminal defense attorney.