if it's a very specific and research intensive assignment then there's no way a writer could do it with a cheap price I think. You are most likely to get a plagarised essay...
I almost got a heart attack after I found out customwritings.com is a scam site and I've just paid $200 for their service. damn.
I am studying biotechnology and have an assignment that's doing my head in and I just want someone to complete it for me but now i think such services are too good to be true. If I was a writer I wouldn't want to get paid for $200 for a 10 pages of research intensive analytical essay.