This mirror is in brand new condition and it is stunning
Brand new? Your listing said you got it from a previous owner, and that it's vintage?
That is true, but it has been kept in brand new condition. I got it from the owner who kept it brand new, and I haven't done anything to damage it at all!
Is there anything wrong with the mirror?
Nothing at all. 
Well, then why do you want to sell it?
I don't have anywhere to put it and it is just sitting around
Okay, well, I guess I would offer $125 for the mirror.
For a mirror like this in its great condition that is too low. I'd like at least 180 for it. 
$180? For that I could buy 3 copies of The Legend of Zelda: Breath of the Wild, the true mirror into the soul of man. The most I would go is $140.
I'm sorry if you cannot go any higher I am going to have to pass on your offer. It may seem a bit much but it is really a great deal. 
Okay, I'll settle at $175, and I'll come by your house tonight to pick it up?
That is a deal I'm for!
Okay, I'll be by your house around midnight with a paper sack full of crumpled up cash.