A high current listing count can mean an agent who takes on more sellers than they can personally service, which shows up later as slower response times, delayed showings and a listing that sits while the agent's attention is spread thin.
What actually predicts a good outcome is closed sales at a price close to list, not the number of active signs on lawns this week. Ask for the agent's last 12 recently sold comparables, not just a current inventory count.
A quieter agent with a tighter client list can outperform a busier one on the number that matters, your final sale price. Get your hand-reviewed valuation from Joel Dyck.