Part of the problem with working at a help desk is finding clients who need an entirely different kind of help.
Billy Mays (1958-2009) was a television pitchman perhaps most associated with products like OxyClean and Kaboom! (I seem to recall that the exclamation point was part of the product name). He could sell just about anything, although I doubt that he would have stooped to selling a genuinely spurious product. He might have liked the gag gift, though.
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I think in the 1960s somebody sold a gas driven pogo stick. Did not sell very good due to broken ankles.
True story, seriously.