[Spridgets] Rear wheel bearings??

[oldsaabguy]

Ok,

the fuel gauge reads more than full and less than half a tank so I  
figure that I'm good.  Now on to other items..

There is a sound coming from the rear of the car that sounds like  
loose metal balls in a coffee can while someone rolls the can.  To me  
that means rear bearings.  So....

Does anyone have a better diagnosis?

If it is the rear bearings is there something I should know regarding  
Mo$$ bits or better to buy local?

Thanks,

Lester