Content writing on Marketing, SEO, Mobile Apps

I need some high quality writing, Need 15 Copywriting texts/articles, my Budget is 30 $ Word count: 300-500 + a picture per piece. You should use some snappy, personal voice so it is clear that its you who is writing this and not a steal from newspapers. Content should be about: 4 on iPhone Applications (something cool) 3 on iPad Applications (Something very cool and very new) 2 on Android Applications (something that people want to download) 2 on SEO (Something new in SEO business) 2 on Marketing (Something fascinating, perhaps some big company declared bancrupcy or some big marketing guru held a speach on advertising) 2 on Copywriting (Give some tips on how to write interesting texts) EVERYTHING MUST BE ORIGINAL COPYSCAPE PASSED. - If you provide good work I will hire you for at least 30 more articles/texts