At Express, buy one select pair of women's jeans and get a second pair for 50% off. That's among the best such offers we've seen from Express. (We saw the same discount on women's jeans among other items last week.) Shipping starts at $8 and sales tax is added where applicable.

A best bet is to buy two pairs of Express Women's Zelda Barely Boot Jeans in Dark (pictured) for $159.98 before the discount, $119.85 after. With $8 for shipping, that's $40 off, $63.93 per pair, and the lowest total price we could find. They're available in short, regular, and long in sizes 00 to 14.