ipse switchit

Something given much merit by a seller but not proven to work as well as the buyer's first choice. A "bait-and-switch" tactic. Punning on the legal term "ipse dixit" (something asserted but unproven) and "Ipswich".

That home electronics store really rooked me on the MP3 player. They gave me one that cost me more than the one I really wanted, and this one doesn't sound as good. Looks like a case of ipse switchit!