You do have a point Beth. It does tend to cost more to frame the pastels and I also agree that it is very hard to compare them. My goal is to feel good about both mediums and eventually have them basically, if not exactly, equal in price and let the look and quality of the work dictate what the client decides to have done. I have never been the most self confident person when it comes to painting and part of me felt like I had to charge less with the pastels, just simply because most other people do the same. It didn't take long for me to realize just as much work went into them, and frankly they have been a lot more expensive than the oils to do!
Mike, I don't know that I have ever seen a pastel you have done! Why not do like Chris, and as Beth as suggested and charge the same.
Since I have only been doing these pastels just a little over a year, when I am asked why they are so much less than the oils, I just say to think of it as my "introductory" price. That before too long I will raise the prices. They seem to buy it and think they are getting a big deal