Work With Body Language
Use body language to your advantage. Mirror your adversary. If the other guy leans forward on one elbow, so do you. If the argument gets heated, stop mirroring and “align.” Slowly make your way to his side of the table and sit down next to him. — Law.com blog
Keep the Right Distance
Don’t encroach on personal space, but sit close enough to show interest and engagement.
Open, relaxed arms show a willingness to negotiate.
Busy legs show distraction and anxiousness.
Strong eye contact shows engagement and strength, but staring is off-putting.
Read the Salesman’s Body Language
If he looks uneasy, go for the kill. If not, wait for his flinch.