A good SEO expert service will want to know you current status and as well the amount of traffic you are receiving at the moment.
It is from the knowledge of the current situation that the service will determine what to do in order to move your site forward.
How Much Will They Charge You And Payment Terms
Money is key in every business, how much will you be paying for the service. Will they do the work base on project or you will retain them.
Know that the most common form of SEO expert service is project based, but you may want to retain them base on the plan you have for your business. According to a research on about 600 SEO service, the range of price is $1000 to $7500 (Project based SEO expert service).