Hello
Good evening, how are you?
Doing well, thanks. Hope you are
Yes.  So you are interested in the tandem bicycle?
Yes.  If I can pick it up, Would you be willing to accept $1800 for it?
If you can pick it up, I would gladly go $2100 on it.  It is a really nice tandem.
I do see it is a nice tandem
I will even warranty the tandem for a full 12 months.
Does it come with any additional items or anything I need to purchase to use it
You will not need to purchase anything to use it, it comes ready to use.  
Ok I would like to buy it but the max I can pay is $2000.  Will that work for you?
Deal.  $2000 it is.