400 word blog post

I need a copywriter who can write unique and engaging news style blog posts on a variety of different topics. My budget is rather small but the work should be regular. The articles need to be researched, interesting, contain stats and facts and include links to where the stats/data/facts were taken from. All work needs to be unique (100% Copyscape clear) .

Please provide me with a quote for just 1 x 400 blog post and how quickly you will be able to deliver the copy. Once I've chosen seller, I'll provide the theme of the article etc.