Hi...nice credenza!
Thanks. You interested in buying it?
Yes, but my budget's limited
Okay well make me an offer I'll see what I can do. 
How much would you like for it?
I'm asking 30 for it :)
I can come pick it up, but with gas, etc... it would be pushing the envelope to make it worth my while....I was looking to spend a max of $20....must be an heirloom this credenza, eh?
Yes it's a pretty rare piece too. I can do 25 if that helps you but that's going to be my limit. 
Definitely feel for you there on the family legacy item.  Listen, if you'll go $23.50, I'll come up myself, get it off your hands, and get you a beer...
Okay and you move it by yourself too then we have a deal at 23