MSR90 USB Magnetic Credit Card Reader Stripe Magstripe Scanner 3Tracks | eBay
Linea Tab Mini 2D Barcode Scanner + Mag Stripe + BT
Amazon.com: Deftun Bluetooth MSR-X6(BT) MSRX6BT Magnetic Stripe Card Reader Writer Encoder Mini Portable : Electronics
Tekit USB 3-Track Magnetic Stripe Credit Card Reader Magstripe Scanner Swipe,USB Mini Portable Magnetic Stripe MSR90 1/2/3 Tracks Swipe USB Credit Card Reader - Newegg.com
Magstripe Reader - PS/2 Interface - 2 Tracks (1&2) : ID 854 : $44.95 : Adafruit Industries, Unique & fun DIY electronics and kits