Zas, marked coins do not indicate the box will be a skunk. People have searched coins for years and like dogs,they can't resist the urge to mark their territory. I have found keepers that are marked. Since I don't search for dates(just silver), I just edge search and back up my search with the "bounce test". I have probably thrown back hundreds of errors,proofs,etc by my method. I don't have the desire to collect but those that do still find gems in my rejects. Cheers, Jim