Experienced player since 2012 in Challenge modes exclusively with over 4000+ runs completed and I have noticed a few things in challenge modes. Most people who pay for CM carries(80%+) do not need a full carry and are just paying for the group and leader to guide them. Sound like you? Then my runs(and their cheap prices) would be perfect for you!
Last few months I decided to experiment around on my findings with all my experience with CM carries, and try out restricting a few rules to access a certin group of buyers who didnt want to pay full price for something they did not need or want a full carry in, so if you can meet my very loose set of rules, then feel free to add my skype(Express-gaming)
Rules for a 40$ carry are: You must know your class, can provide decent boss dps(trash dps matters little), and can listen to instructions via skype
To do good dps all you simply need to know is your single target rotation and have decent gear thats gemmed and enchanted and reforged for raid hit/exp caps
SKYPE: Express-gaming