I haven't had any "magic wand" stories other than someone wanting a quilt "by Friday" (impossible!), but I did have a guy who came by my craft fair booth last year that I wanted to
bonk in the head with a magic wand!
He picked up a quilted wristlet, turned it over, saw the price tag, and muttered to his girlfriend (loud enough for me to hear) that it "wasn't worth $6". They left.
For one thing, it was WELL worth $6 ... I tend to underprice my stuff ... and for another thing, the price tag clearly said it was $4! Yep, FOUR dollars, not six.
I kind of wish they'd come back by, because I would've HAD to mention that the $4 wristlets sold out!