Sounds right; the set is $49.95 and comes with the 5-lb. bar plus 35 lbs. of plates, although the bar can hold up to 80 lbs. It is clearly marked in the online catalog as the Troy lite system, so be sure you see the name.
The Walmart one, at $19.95 is a great deal if you can't afford the Troy lite system, but it is more limited in that it comes with only 10-lb. plates and 5 lb. plates. It doesn't have 2.5 lb plates and I don't see them available separately. If you always lift heavy, and don't need the extra increments, this may be fine for you. The weight of the bar itself is not clear to me. Perhaps the Troy lite plates can be used on the Walmart bar? Someone who has the Walmart set would have to answer these questions for you.
Hope this helps a bit.
-Nancy