Are you interested in the lamp?
Hello. Would you be willing to sell this lamp for $40?
40 is kind of low
Is there anything special about the lamp that makes you want to sell it for $60? That's pretty pricey for a table lamp.
Well, it hasn't ever been used. It's basically brand new. 
Would $45 work for you? I can find lamps much cheaper elsewhere. 
I can do 45 if you come pick it up
Will do!