Ebay offers Dickies Men's Relaxed Fit Straight Leg Flat Front Flex Pants for $11 (reg $24.99) with free shipping.

Product Description:
Comfort and style combine to achieve the essential pant for everyday wear. Genuine Dickies Men's FLEX Twill Work Pants provide a professional look with easy care through a Tough on Stains® and wrinkle resistant finish. The durable twill blend ensures that these pants were built to last while the FLEX technology provides maximum mobility no matter which way you bend, stoop or kneel. Don't sweat moist conditions either, these pants are designed to wick perspiration to keep you cool and dry no matter your work environment. Dual front and rear pockets team with a multi-use pocket that will easily fit a cell phone or wallet, keeping all your essentials at an arm's reach. 
Features:

• Relaxed fit
• Mid rise
• Straight leg
• Cotton-polyester blend fabric
• Button closure with zip fly