The perfect magnetic coin
The thing you have to watch for in magnetic coins is any tell-tale visible signs that the coin has tampered with. You must also take care that the SOUND is good. With Tango magnetic coins, they look PERFECT and the sound is great too.
Repairing a magnetic coin
Magnetic coins are made of two parts, glued together. If you drop your coin on a hard surface, it's quite possible that it will fall apart. It's easy to fix with superglue or an epoxy glue.