Proofread Humanities Academic Papers

I have a series of humanities research papers that are ready for a final polish. What I need now is a sharp-eyed proofreader who can focus on grammar, punctuation, and spelling so the writing flows smoothly and reads as professionally as it should before submission... (Budget: $250 - $750 USD, Jobs: Academic Writing, Editing, English Grammar, Language Tutoring, Proofreading, Research Writing, Technical Writing, Word Processing)