Personally, I would hesitate buying a second hand CD player in a private party transaction. , especially CA since many Azure 640's have complaints regarding noise and build quality. CA sells a lot of players though and many review them positively. I have a 640 and like it. I just looked on the Audio Advisor site and found 2 CA 540's for under 300.00 (usd) in the clearance bin. At least you can have some warranty and service potential with their demo gear. I would not go back to a mid-fi player though, I think the entry level audiophile players with good DACs spank them for quality.