Hi! I saw your post for the Apple iPhone EarPods. I was hoping to get them for $10.
Hey. Hows it going. Thanks for your interest in the ad. Althought they are OEM, they are still priced way below the original Apple iPhone EarPods. 
Yes, I can see that. Would you accept $15 cash?
$20 and its a deal. That is 20% off from what I was originally hoping to get for them. 
OK, if you'll throw in free shipping, it's a deal.
Sounds good to me.