Pricing depends on the complexity of the source document, including the subject matter and terminology, how easily the text can be read (for example, Russian medical documents can contain a large number of abbreviations or be partly handwritten), how urgent the job is and whether you are needing it done outside of regular work hours or on the weekend.
My rates start from 0.10 USD/word or 0.12 AUD/word for translation.
I charge from 40.00 AUD per page for standard Russian certificates that need to be translated into English for use in Australia. I can also certify them with a NAATI stamp if required. Certification with a NAATI stamp is usually required when submitting official documents to Australian government agencies and authorities, for example, for migration or study purposes.