The price you need to pay for the SEO services depends on the size of your business. It will also depend on the level/extent of optimization services you require. As mentioned above, you might witness differences in the charges from agency to agency. But that shall be all based on the agency’s capabilities and expertise to deliver optimum results. Once you get quality results, queries like SEO pricing how much does not matter anymore.
Besides, there is nothing like Cheap SEO services when it comes to search engine optimization. You get what you pay. Companies selling SEO consultancy by SEO consultants and experts will want a price for consultancy sessions whereas, some other naïve service provider will do that for free. Be prepared for a flexible SEO budget.