Woot offers Levi's 505 Regular Stonewash Stretch for $18.99 (reg. $39.99) free shipping with Prime. 

Product Description:
Find your favorite pair of blue jeans for men, a timeless classic fit. While some denim styles may come and go, our men's jeans have always been timeless. Get Levi's men's straight leg jeans for a balanced cut that is simple and casual.

• LEVI'S 505: These jeans feature a classic straight leg styling created in 1967 with the original zip fly and 5 Pocket Styling.
• SIZE & FIT: These 505 Regular jeans sits at the waist with a straight leg opening and designed with room in the thigh for a comfortable fit.
• MATERIAL & FABRIC: Levi's 505 jeans are made from a cotton blend.
• CARE INSTRUCTIONS: Machine wash cold inside out with like colors, Do not bleach, Tumble dry medium, Hot iron if needed, Dry cleaning possible.