For its newsletter subscribers, newegg offers the Sans Digital MobileSTOR 4-Bay eSATA / USB 3.0 Hard Drive Enclosure, model no. MS4UT+B, for $139.99 with free shipping via the directions below. That's the lowest total price we could find by $46. It holds up to four 3.5" serial ATA hard drives configured and supports RAID modes 0, 1, 1+0, 3, and 5. Deal ends June 5. To get this deal:

1. Add the Sans Digital 4-Bay eSATA / USB 3.0 Hard Drive Enclosure to your cart for $189.99
2. apply coupon code "EMCXPXS37" to cut it to $169.99
3. redeem this $30 mail-in rebate to further chop it to $139.99