do not buy chips from ebay, from this seller (jk_parts)
I've bought several hundred EPROMs from that seller and I've only ever run into 2 or 3 bad ones.
i don't know what to say sir because i didn't use the chips at this moment .. are in the tube that comes with the box. but i only say about them are scratched from original brown sourface and stamped with pink infos on them . may all what i have at home now will be great to use on the future projects too.... i found a chip without a leg in the lot i grabbed.