There are many great models on ebay, but will their performance match up to their spectacular reviews on audioreview.com? I have a Sansui 771, which is supposed to be a very good receiver, but the sound is not nearly as crisp as my Onkyo HT-R410 receiver no matter what the source. Does this mean the Sansui needs to be reconditioned? Will ebay models need to be reconditioned? Thanks, -Jonathan.