Echo Store via Amazon discounts select Macbook covers, as listed below. Plus, Prime members qualify for free shipping. (Non-members can spend $35 to qualify for free shipping; otherwise, it starts at around $5.) The deals:

• Slicoo 2-in-1 Hard Case for Macbook Pro 13.3" for $7.99 via "GPZOEUMM" ($17 off)
• Slicoo 2-in-1 Hard Case for Macbook Air 13.3" for $7.99 via "UU2API48" ($22 off)
• Slicoo Soft Touch Cover Case for Macbook 13.3" w/ Retina for $7.99 via "CXAKFM3U" ($17 off)
• Slicoo Soft Touch Cover Case for Macbook 15.4" w/ Retina for $8.99 via "R6OIG4PT" (pictured, $21 off)