[EliAndrewC]

I remember an anecdote about a record store with a similar tactic for selling CDs. They'd put out 5 copies of a CD; 4 copies would be marked at $13 and 1 copy would be marked at $11. People browsing would notice the cheaper copy and immediately snatch it up, thinking they had found a good deal (possibly due to a mistake on the part of the store), at which point the store would just go and "mark down" one of the other copies.