Selling things

I have been helping Stacy sell some things she doesn't need.  She asked for help.  Sure, I said.  I can do that.  A lady called for the lawnmower and of course Stacy had to be elsewhere when the lady could come over.  Okay, Mom to the rescue.  Sure I can tell the lady what brand, size of deck and horsepower.  Now she wants me to show her that it works.  Okay I turned the key, nothing happened.  No, I have never started the mower before, that's Bob's job not mine.  Good thing she knew how to do it.  Yes, the mower started and she bought it.  I was successful!  Yea!  What can I sell next?.....