As a customer - in this case I don't want to build "relationship" with some random middleman reseller. I know exactly what i want and rather avoid wasting time

As a customer - in this case I don't want to build "relationship" with some random middleman reseller. I know exactly what i want and rather avoid wasting time on upsells thrown at me. I understand that sales departments strongly prefer "bait and pimp" vs. "sell and forget" strategy - but some customers and often significant ones will give business to competitors if former is the only strategy to generate revenues.