I think your 700 words for $10 is too much, you are still a newbie rank member without any proof of work in the past if you can only just put a link to your past work or at least show some visuals(you can't as you're a newbie) for reference to your future clients, anyone can claim other's work though so be transparent.
In reality, the price is ridiculously low....
Assuming that the OP is doing the job correctly (there is no reason to doubt it), the rate for a 700-word text should be between $100 and $200
The fact he’s a newbie on Bitcointalk is not relevant.