Hi, I'm interested in your tandem bike. 
Hello, the price is $3000. It iis in good condition and trunks to hold items while you are riding.
A trunk would be nice. Is it in good condition? Any rust?
Yes in good condition and no there is no rust.
Cool, is your price fixed or can you come down some?  It's a little out of my price range/
You can make me an offer if you'd like.  I am pretty firm on the 3000 range, I could come down a tad bit.
I have $2280 cash, I could come get it today.
$2280 is too low.  Could you do more like 2750?
That's just too high for my budget.  Can you come down any lower?
$2700 is my absolute lowest.
Can you deliver it for that price?
Yes