I am willing to negotiate
the bike looks nice has it ever been wrecked
Nope! I got it for exercise a couple years ago.
i can offer you a thousand for it
I think $1000 is a little low. Im willing to do $1200. Thats 800 of because its just sitting here taking up space.
$1200 sounds resonible 
good deal where shold i pick it up
we can meet somewhere like the local library. Do you accept my offer?