STOP BUYING SIMPLY USED AND BUYING OTHER PEOPLE'S PROBLEMS.  I have personally gone through this unit, cleaned, repaired, inspected and tested this CD Changer.  Bose Wave Music System 3-Disc Multi-CD Changer  - 100% 90 DAY WARRANTY. Condition is "Seller refurbished".

Received this unit needing a few minor repairs.  All complete and fully tested.  Working 100%.  Cleaned internals completely including all switches and laser.  In good, used cosmetic condition.  This is the CD changer  accessory ONLY.  You need a bose wave radio or wave music system with a single CD player for this unit to work.   If you already have a bose unit you will need to update the software in it if it has never had the multi-CD accessory attached.  An update disc is available online. 

NOTE: This accessory is only compatible with the Bose Wave Music System circa 2005-2011 and is not compatible with the Bose Wave Music System III or IV, Bose Wave Radio, II, III IV: older Wave Radio/CD players with top-loading CD design or any Bose Acoustic Wave Music Systems.