Western Digital Store discounts a selection of its refurbished external hard drives via coupon code "DNDEC1", as listed below. Plus, these orders receive free shipping. Sale ends December 26. The deals, with prices after coupon and comparisons to new units:
Refurb WD 1TB My Passport USB 3.0 External HDD for $29 (pictured, low by $24)
refurb WD 2TB My Passport USB 3.0 External HDD for $48 (low by $22)
refurb WD 3TB My Book USB 3.0 External HDD for $55 (low by $35)
refurb WD 4TB My Book USB 3.0 External HDD for $62 (low by $28)
refurb WD 6TB My Book USB 3.0 External HDD for $82 (low by $46)
Note: A 6-month Western Digital warranty applies.
These retailers offer some of the most consumer-friendly price-match policies anywhere.