Hello, I am interested in your iWave speaker. The asking price is $20 correct?
Yes it is, it's brand new, can I tell you anything about it? 
It is brand new correct? Are you willing to go any lower than $20 perhaps?
Yes, it was an unwanted gift still sealed in packaging. I'm reluctant to go much lower but I might 
I could come pick it up right now for $10, How does that sound? 
I wouldn't let it go for less than $15
How about $12? You said yourself it was an unwanted gift. You could have a nice dinner with this atleast. I mean... How good is an iWave anyways?
I want to get myself something comparable in price so I can show it to the person who gave me the speaker. iWave are excellent, I already have one of their speakers. How about $13.50 and I'll throw in a spare usb cable? 
Could we make it an even $13? My change in my cars cup holder is pretty sticky from last nights Taco Bell spill. I would hate to have to give you those quarters right now.
I wouldn't want those :) $13 it is, I'll see you later! Thank you