The main traits I want are:
1. Be Knowledgeable, not only about your equipment, but about the competitors equipment. Listen to what I need the equipment to do. Then be prepared to explain what equipment (both yours and the competitors) will best work for me. Point out the strengths and weaknesses of those machines. Be prepared to discuss operating costs and repair parts costs. What ultimately sold me on buying my loader was an excellent service department and resale value.
2. Be Honest. The first time I hear a salesman state something I know is not entirely truthful, I'm done talking with them. You need to be upfront about maintenance issues and problems that are being found by customers.
3. Follow-up. If you tell me you are going to do something, do it. At a minimum, phone me and tell me why you are going to be delayed.
The big thing that will shut me down is a salesperson that assumes that they know what I need and attempts to hard sell me.
By the time I talk to a salesperson, I have done extensive research and am speaking with you to fill in the gaps. If you know less than me about your and your competitors equipment, there is no point in me wasting time talking to you.
All equipment will need service. If the dealership you work for has a bad service department or significantly higher parts costs, you will never get to talk to me anyway...