Man, it's hard to pin down an exact number because the cost of stem cell therapy can vary greatly depending on what you're getting treated for and where you're getting it done. But ballpark, you're looking at anywhere from a few thousand to tens of thousands of dollars. It's a significant investment. But again, it's all so new and experimental - it's a wild west out there. Always make sure to do your research, consult with professionals and weigh the pros and cons before going down any treatment route.