Summary: Citing the opinion of an authority to gain clout.
One of the more powerful tactics to utilize when presenting information in a negotiation is to cite the opinion of an expert.
Example
A man is selling his automobile for $12,000. A woman tells him that she will buy the car for $11,500 if she can take it to her mechanic to make sure there are no major problems needing repair. The prospective buyer takes the car to her mechanic who prepares a computerized printout outlining $1,500 worth of repairs. The buyer returns to the seller with the computerized report of needed repairs and a revised offer to purchase the car for $10,000.