 What isn't a reason for narrator to be so skeptical of Gorb?
My three staff men, Auchinleck, Stebbins and Ludlow, walked shieldwise in front of me. Broadsides like that, distributed wholesale in half a thousand languages, always bring them running. It's the best of its kind, the only really decent place where Earthmen can get a gander at the other species of the universe. "Before we begin, I'll need certain information about—" "I am a being of Regulus II," came the grave, booming reply, even before I had picked up the blank. I passed him along to Auchinleck to sign at anything short of top rate. Before then, anyone could visit Earth.
 Gorb was asking for too much money
 Gorb looked just like an Earthling  Gorb was asking for too much money  Gorb had no proof to back up his claims  he had never heard of Wazzenazz