Not sure I am the "best" candidate, however I am more than capable!
My bid is an estimate, as I do not know exactly what type of newsletter you would like written and require more information from you:
* How many words (need to work out what you are paying per work, to work out the potential I can make hourly with my writing skills).
* How many articles are you requiring to be written & how often.
If you can provide me with more details, we can discuss more.
Thank you kindly.