Hello. Can I help you?
Hi. I am interested in purchasing this bike. Can you tell me a little bit more about it?
It's been a good bicycle, I used it a few times in high school and then hit a growth spurt, so it's now a little too short for me.
have you used it a lot? 
For te first month or so, yes, but then grew six to seven inches and the frame was too small. Bought it on Craigslist six months ago. Just trying to recoup some of what I paid for it.
okay. I would like to get it but the price is way way high for me. Is there anything we can do about it?
I'm flexible to a degree on the price. It is a Trek bike and they are known to be high quality bikes, though. What are you thinking?
how about $85?
No, that is way too low. I'd go maybe $120 and be willing to drive it to your home.
okay that works for me. I am down for it then! Thanks!