But a sales price commission, of all possible completion-based pay structures, makes the interest of the agent misaligned with (opposed to, in some respect) that of the principal.
Have you read Freakanomics? They find that agents are more interested in closing add getting paid rather than the extra couple hundred dollars of commission a $10000 swing in price gets them. I'd gladly fight to save a buyer I represent $10000 on price even if it "costs" me $200-$300 of less commission.
