If its the sword thats purple, then its worth 15mil+ Although, i dont know if theres anyone that is willing to dish out more, as im not sure if they just want a good 15>50, or if they like these equally or better.
LOL It's more than likely fake. Unless there was this huge error that caused the writing to appear in purple instead of gold. Although it's highly unlikely. If anything the mod is most likely 15 below 50% Prove us wrong with an in game pic.