The last two pair were Levis for Mr. R. - $36 on sale, no tax on base and $36 on sale, plus tax at Bealls. They fit him well and last about 3-4 yrs.
Me, I sometimes wear a designer brand from Sears:), because they fit me well. Usually $30 on sale, they never last past 2 or 3 years.
Other than that it is whatever I find on sale colored or white jeans for $14.99 avg price at Marshals or TJ Maxx - I've been lucky, most last at least two years, my last ones are 4 yrs old and still looking good.
Did pay 100 bucks for a pair of black stretch jeans at a boutique 3 yrs back - call it temporary insanity, but they do look sharp on me. They should hold up another year at least, so in the end it was an acceptable price.