Groupon offers a selection of Incase Hardshell Cases for MacBook Pro or Air in seven colors for $14.99 plus $3.99 shipping, as listed below. That's the lowest total price we could find for any size case by at least $10, although we saw a MacBook Pro 13" case for $8 less in March. It features thermal vents and raised rubber feet. Deal ends May 13. The deals:

• Incase Hardshell Case for MacBook Air 11" for $14.99 ($35 off)
• Incase Hardshell Case for MacBook Air 13" for $14.99 (low by $15)
• Incase Hardshell Case for MacBook Pro 13" for $14.99 (low by $10)
• Incase Hardshell Case for MacBook Pro 15" for $14.99 (low by $17)
• Incase Hardshell Case for MacBook Pro 15" with Retina Display for $14.99 (low by $14)