Copywriter needed for 50 articles - only native speakers

I need a native English speaker who can provide 50 articles. Requirements for the articles are: 1. The articles must be 100% unique (will be checked with [login to view URL]) 2. The articles' body (not including title) must be at least 500 words. 3. The articles must be free from spelling and grammatical errors. 4. The articles must include a well-written, attractive title that includes the primary keyphrase. 5. The articles must include an introduction. The reader needs to be told what is coming. 6. The articles must include a summary at the end of the article. 7. The articles must include keywords you will receive beforehand. 8. In addition to the articles, you'll be required to write a 1-2 sentence summary of each article for the meta description tag. The articles needed are for: - website content write-ups, mainly for made for adsense websites - web sales page copywriting - articles for submission to articles directories This is your first assignment, upon satisfactory delivery follow-up jobs will be provided. Please send some samples of your work. The project will be awarded to the cheapest supplier providing sample articles of acceptable quality. PLEASE ONLY BID IF YOU ARE A NATIVE ENGLISH SPEAKER AND CAN DELIVER THE 50 ARTICLES WITHIN 4 WEEKS MAXIMUM. I AM LOOKING FOR BIDS IN THE RANGE OF $50-150 ONLY.