Professionally edited manuscripts are more likely to be appealing to publishers.
In today's ultra-selective publishing climate, agents and publishers want to see work that is as close to perfect as possible. An unpolished manuscript rarely makes it out of the sludge pile. A professionally critiqued and/or edited manuscript may increase your chances of publication.
I freelance edit for a limited number of clients. If you're interested, contact me and we can chat about your editorial needs.