Sure it does. The salesman may have information you were not aware of. They could even tell you something which satisfies your needs better and is cheaper. Not all salesman are out to screw you, some really care about a happy customer.
I’m reminded of an old Hypercritical episode. If you ever heard John Siracusa, you know he does his research and knows what he wants. Yet when it came time buy a TV, which he had intensively researched, the salesman mentioned plasma and how the tech had improved and it threw a wrench in Siracusa’s whole decision.
