eXpansys-USA offers the Acom Data 3.5″ mini Pal USB 2.0 / FireWire External Hard Drive Enclosure, model no. EN508-B601, for $17.99 with free shipping. That’s the lowest total price we could find by $5. It accommodates 3.5″ IDE hard drives up to 320GB. Although this enclosure is designed to match the Mac mini, it’s also compatible with PC systems.