At Body Central, buy one regular-price item, and get 50% off a second item of equal or lesser value via coupon code "BOGO". Shipping adds $5, or bag free shipping on orders of $50 or more. A couple of best bets, with prices after coupon:
Target offers the Cherokee Men's Slim Fit Jeans in Denim Blue (pictured) or DK Denim for $32.99. Coupon code "JOY30" cuts it to $23.09. With free shipping, that's $10 off list and the lowest total price we could find. They're available in waist sizes 28 to 42 and a 32" inseam. Deal ends December 20.
Orders placed by December 20 are guaranteed to arrive by Christmas.
AltaTac via eBay offers the 626 Denim Men's Slim Fit Skinny Jeans in nine colors for $14.99 with free shipping. That's tied with our mention from last week, $85 off list, and the lowest total price we could find. (It's also a very low price for men's jeans in general.) They're available in sizes from 28 to 36.
Tommy Hilfiger offers its Tommy Hilfiger Men's Relaxed Fit Denim Jeans in Medium Wash for $49.50 plus $7.95 for shipping. That's $10 off list price and the lowest total price we could find. They're available in inseams 30 to 34 and waist sizes 30 to 33, although not in all inseam/waist combinations.