Photo touch up's, long term

Hi, I have a website for photographers looking to improve their work. I'm looking for a few people with above average photoshop skills. You'll have to adjust lighting, fix flaws, crop, add affects, ect. Please let me know how much you would charge for 40 photos. Bidders should have high speed internet and a newer computer as each photo could be 10-20mb. Please let me know if you have samples of prior work.