Amazon offers Prime members Downton Abbey: Season 1 on DVD for $6.96. Clip this $5 off coupon to drop it to $1.96. With free shipping, that's the lowest total price we could find by $11. (Non-Prime members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $4.98.) It includes all seven episodes as originally aired in the UK on three discs.

Also available for Prime members is Downton Abbey: Season 4 on DVD for $9.96. Clip the $5 off coupon to drop it to $4.96. With free shipping, that's another low by $11. (Non-Prime members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $4.98.) It includes all nine UK episodes on three discs.