I buy my own Restylane fillers. How much does a doctor charge for injecting it?

Stella,The physician you go to should have expertise that will make sure that the material is placed in the right place.  The material itself is not typically marked up particularly, it's the expertise and skill.  I don't think any wise physician would use your material where they don't know what it is or where it came from.There are places where it makes sense to save money. This is not one of them.

I would never inject a patient who has obtained her own product.  First, it happens to be illegal for a non-physician to purchase fillers and you cannot assume that what you have purchased is actually Restylane.  To the extent that you think that $100 per visit is a reasonable fee, I must comment that plumbers and electricians charge $250 and more for a diagnostic visit.  What you perceive as a way of saving money by purchasing what are the equivalent of "black market" goods is a way to cause grave harm.  

I don't believe that any certified physician would agree to inject filler brought in by the patient.  There would be no way to guarantee that the filler is genuine and sterile.  You should only be injected by a certified, well trained and experienced doctor who buys their genuine fillers directly from the company and not on a secondary market or from overseas.