This is not an "ebay thing". I've purchased stuff untested, as-is, etc. from other venues without problem. I have also sold stuff as untested because what I'm expecting to get for that item isn't worth hooking something up, etc. (basically what Brad808 said.) I expect buyers of these items to be fairly technically inclined and accept the risks. Likewise, I accept the risk when I buy untested items, because, being untested, it usually can be had cheaper.