I recently took advantage of a bad speller, quite by accident.
I was after Medal of Honor for the PC, with the game regularly selling for about £20 - £25.
I did a search just for "Medal of" - basically due to laziness, and found a guy selling Medal of Honer (I ended up with it for £16) - there were also a few spelling "Honor" the correct way too in English "HONOUR"but obviousley the wrong spelling for the game.