I know some of you have bought o2 sensors off ebay. do any of you remember who the seller was? can any of you recomend a particular seller on ebay? I am looking to replaced my up stream o2s and my local stealership want 110 a piece. on ebay they are only 71 including shipping. so i would save $78. and yes this is for stock motorcraft o2s. I know the bosch one are crapola thanks.