The cost of sclerotherapy can vary from doctor to doctor and locale to locale. I charge 350$ for the first session which is a full treatment getting the spiders and reticulars. The follow up sessions are priced depending on how much is required to do. If it is a second full session then it is 350$. If it is less than a full session then it is prorated depending on how may syringes I use.
i charge per session $300 for the first two sessions and $150 dollars for each additional session. Prices can vary per region. This is my price in the washington, dc area.