Considering the way properties typically are listed, the more appropriate question is why wouldn’t you? When a commercial property is listed with a broker, the commissions are already baked in. Therefore, if you don’t take advantage by bringing your own representation, you are essentially leaving money on the table. You are not fully taking advantage of all available resources. And when you pass on the privilege of tenant representation, that money either goes to the listing broker or stays in the landlord’s pocket.