Buy.com offers the Fantom 4TB G-Force MegaDisk eSATA / USB 2.0 External Hard Drive, model no. MDE4000, for $239.99. This $20 mail-in rebate drops it to $219.99. With free shipping, that's $0.05/GB, $80 under our mention from last August, and the lowest total price we've ever seen for a 4TB external hard drive. (It's also a current price low by $10.) It includes two 2TB hard drives that can be configured in multiple RAID modes. Rebate expires June 8.