Groupon offers a selection of Vistaprint Custom Cases for iPhone or Samsung Galaxy from $9. With free shipping, that's up to $16 off list and the lowest total price we could find. The protective cases feature four sides of coverage, rubber shock absorber layer, and button covers; while the lightweight cases feature two sides of coverage and a hard plastic layer. Deal ends November 21 at 1 am ET. The deals:

• Vistaprint Custom Lightweight Case for iPhone 4/4S or 5/5S for $9
• Vistaprint Custom Lightweight Case for Samsung Galaxy S III or S4 for $9
• Vistaprint Custom Protective Case for iPhone 4/4S or 5/5S for $14
• Vistaprint Custom Protective Case for Samsung S III or S4 for $14