Slowly I got to know the names, and the reps, and I found an agent. It's tough when you're out in Podunk and very green. And of course, writers are in a hurry too. They think they've got brilliance just waiting to be unleashed on the world. It's a buyer's market.
Writers have to work hard even to get an agent's attention.
Having gotten it, it doesn't seem unreasonable to expect the agent to respond politely to a request about recent sales. Except that you haven't written to fifteen or fifty of them and found that only this one will deign to see you.