"It is estimated that every five seconds, one BILLY bookcase is sold somewhere in the world."
To keep the engine running, here is a bookshelf on sale, a older model of the aforementioned Ikea Billy (https://www.ikea.com/us/en/catalog/products/00263850/#/40279788), differing mostly in the backplane.
Well kept, comes with optional wall-mounted support (which we did not use).
Asking for 15$ or best offer.
Pick up on the buyer, in Mountain View, CA.

Measures according to Ikea: 80 x 28 x 202 cm^3 (31 1/2" x 11" x 79 1/2").

A picture of it: https://drive.google.com/file/d/0B8ZuxyooSev4X2hDV05jbDNITkYtRklINzlqb1JVWmRLOXRn

Reason of sell: moving to a smaller apartment.