Brilliant Footwear via Amazon discounts a selection of women's boots to around $20. Plus, Prime members bag free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping starts around $5.) A couple of best bets:

• Sporto Women's Flynn Low Heel Ankle Boots for $19.80 (pictured, $32 off)
• Weatherproof Women's Milo Faux-Fur Winter Boots for $19.80 ($46 off)