Well, depending on how many times you have resurfaced the drum, you may need new ones anyway. The age of your car being what it is, it may be time for new drums.
If the drum is rusted on, sometimes all it takes is to pound the s*** out of it to get it off, and alot of penetrating lubricant.
If you have a shop do it, it will probably run you about $60-80.
-Damon