NeweggFlash offers the Mediasonic ProRaid 4-Bay 3.5" SATA USB 3.0 Enclosure, model no. HF7-SU3S3, for $89.99. Redeem this $10 mail-in rebate to drop it to $79.99. With free shipping, that's $40 off list and the lowest total price we could find. It supports up to four 8TB hard drives and features USB 3.0 transfer rates of up to 5 GB/s and eSATA transfer rates of up to 6 GB/s. Rebate expires September 16.