I agree with almost everything said here, from the dealer perspective. A very reasonable, balanced take on things. Your relationship with your dealer should be healthy for both parties. Dealers obviously need to make their jobs profitable. The good ones will select products that profitable but not way out of line. Often these products will have some features that are better/enhanced than similar non-supported online products. Such as OVRC, the dealer cloud management system, that comes with Araknis. This allows the dealer full access to every feature of the network remotely, making troubleshooting/servicing issues MUCH quicker/easier and therefore less costly in the long run. Not to mention, remote reboots, firmware updates, familiarity, total support from the manufacturer and guaranteed compatibility with the overall system (C4, etc). The Araknis warranty support is outstanding with advanced replacement. Often the dealer will have the same models in stock for emergency replacements. ALL of these value adds will likely be billable on a job where the dealer does not provide the network. Not good for the dealer or client.
As far as speakers, the reason given for selecting Origin speakers is sketchy and a possible red flag, OR possibly just half assed. The dealer should be able to give you very specific reasons why they chose to support their product lines AND have lower and higher priced alternatives that are still high quality and profitable.
A dealer should bring a TON of added value to a job, far and above the pricing of any individual equipment. Find a good one that will and that you are comfortable trusting. Ask for specific reasons on anything questionable. Definitely find a dealer who is smart, trustworthy and a good match for you even if you need to look elsewhere. But please realize that this is a very complex business and equipment selection and pricing is a complicated issue. DM me if you want a quick take of specifics ANM3910.