$50 is a good price for it. If you want it lower, try buying it used. Otherwise I think you are stuck. It is still worth it though.
My watch count goes:
S1 = 4 times.
S2 = Can't even count. I was selling copies of the show on VHS for a while to people who missed episodes on the original airing (shipping + production cost = no profit). Since it was VHS I saw most of the episodes (especially the first few) like 10 or 15 times.
S3 = 3 times.