I know everybody sort of think that’s what they should do, but since the basic price here in Fiverr is $5 the only real way to differentiate sellers is to read what they are…writing.
Here are some basic tips:
a) Read some info about how sellers like the one you are addressing are doing their job. Make sure you learn what are the best practices that are used in order to deliver a job. Only learning about the best practices tells you if someone is a crook or at least an unprofessional because best practices is something that a professional always seeking in order to make a better job. For instance if someone is a PPC campaign manager he/she has to know about how to conduct A/B testing & explain what he/she does.
b) Ask about the limitations of the job that the seller delivers including the amount of timr he/she will have to put into it. Rational & experienced sellers make an offer in accordance to limited set of expectations. They won’t promise you to do anything for a limited price. Thus, If you will take the PPC manager for instance, he/she won’t offer you to manage a large scale campaign that demands dozens of labour hours for a hundred bucks while the cost of one hour of labour in his/her country is $100.
c) If the job that you demand is complicated & you know it - ask the seller a general solution for your complicated job. For instance, if it’s a PPC campaign management ask him for to write steps he/she approaches to the setup and/or management of a campaign.
d) Repeat some of the professional questions you’re asking in different versions. Only a serious seller will reply you coherently. Those who are unprofessional will only try to satisfy you. In the case of PPC campaigns management if you will ask to always have your ads first on the search engine & be replied that it’s definitely possible but afterwards for the repeated question he/she will tell you it’s not always possible, this inconsistency should alarm you that all he/she wants to do is to keep you happy without connection to reality. A serious & professional seller will consistently tell you that this request cannot be complied due to the auction model PPC engines use.
Hope this will help you,