Queen-size bed for sale (used about one year and a half):

Frame (Ikea Malm black-brown): http://www.ikea.com/us/en/catalog/products/S39931162/
Slatted base (Ikea Sultan Lade): http://www.ikea.com/us/en/catalog/products/25844409/#/75844609
Mattress (Ikea Sultan Finnvik): http://www.ikea.com/us/en/catalog/products/00139851/#/60139848

Bed like new, assembled by a professional, never disassembled since then, no damage, no tear-wear.
Mattress has a few stains but still looks fine and is as comfortable as a brand new one.

Asking $180 for the frame and base ($239 without tax for a new one from Ikea) + $170 for the mattress ($349 without tax on Ikea.com) or $300 if purchased together ($50 discount).

NB: You will have to come pick it up in the Barron Park area of Palo Alto and the bed might have to be disassembled to exit the bedroom.