Most of the cheap eBay ones are untested. I've been looking for a while. I made an offer on one that was in 'great working condition'. It turns out it is missing the wiring with the unique plug. Can't use it, and how do you know it works? There is a brand new in the box Sears for $85 but he wants $20 to ship it. I am not paying that much for crappy sound. It's more of a nostalgic thing, because I really like my music and usually go top end all the way.