We are going in opposite direction the same date in the evening. You might want to propose your taxi driver that he picks is up and like this he doesn’t go empty on his road back. This might reduce the price. Please, contact me if you like this possibility.
Otherwise, we can do these damned scene in reverse: we found a taxi that will bring us from Mirissa to Ella for 8000. We should arrive to Ella at about midnight. If you want, you can try to go with our taxi back to Mirissa.