I think my shrink-to-fit Levis (and they really do shrink to fit) run $30-$40 a pair, sometimes on sale for $25, but rarely.

My work trousers cost a lot more ("Kut from the Kloth" or some goofy name like that) but I don't mind because they look good and they don't gap at the waist nor are they too short in the leg. The fabric of the ones I'm wearing today is a bit of a stretchy corduroy and incredibly comfortable.

I really hate shopping for pants because it's so hard to find any that don't gap in the back and are long enough.