Low-order digits in pricing have also been used for signalling in auction bidding and in price-fixing among vendors. I wonder how these "Turing-type" effects are handled by classical economic theory? At 12:22 AM 12/10/2014, Seb Perez-D wrote:

Major retailers use the final digits of the price to signal which items are "marked down, specially priced, rebate items, discontinued, or will be not be restocked".

I'd bet this is not for psychological reasons, but one never knows.

http://lifehacker.com/know-the-secret-price-codes-at-major-retailers-to-save...

http://lifehacker.com/save-even-more-money-at-costco-by-knowing-their-secret...