If you have a two track instrumental plus vocals recorded, this service is best. At ONLY $49, this is what you'll get:
 
A industry quality mix
Autotune included (Melodyne can be subsituted at an additonal rate if preffered)
Turn around time is 48-72 hours from when final files are sent
2 Free revisions
 
Once purchased, you will recieve a zip file with insturctions on how to send files. Once final files are sent, mixing will begin!