Hi,
I have written several SoP's and CV's for US grad schools, for myself and for friends, and with good success. Please find a sample and more details in the private message. You can also find my resume on my freelancer profile.
I can't say I have written SOP's for money before, but coming from a premium university in India where seniors, batchmates and juniors keep applying to competitive US grad schools, I have gained experience in writing and reviewing these essays.