Good lord I'm losing respect for some of you. Nobody has ever looked good in jeans from Costco. I don't recommend buying jeans for more than $100 (although the best pair I ever owned cost about $150 and I wore them regularly for like 7 years and still do to this day, even though they are wearing out).
But you can buy really nice jeans that retail at $90-$140 at certain times of the year for $50-$70 and they are totally worth the investment. I just got 2 pairs of Buffalo's at 70% off at The Bay last week. They fit/look awesome and I won't need jeans now for another 3-4 years likely....and it cost me like $85 taxs incl.
I'm 34 if anyone cares.