Before you EVER accept an interview with CoStar, you need to understand how the company claw-backs the commission you make via reversals (a.k.a cancels.) Prior to CoStar I sold data at multiple companies all over the country and never once did they take money out of my pocket for clients who cancelled that I did not sell. This policy is medieval and it drove me to leave the company. Management is not sympathetic to you at all with your plight and actually blames you for the reversal even if it was out of your control.