external midi interface

$169.99 M-AUDIO Fast Track Pro Mobile USB Audio/MIDI Recording Interface with Preamps	$174.95 M-Audio Mobile USB Audio/MIDI Interface Mic Preamp
$395.00 ESI ESU1808 ESU-1808 8in/8out USB AUDIO/MIDI INTERFACE/ EXTERNAL SOUND CARD NEW	$167.00 Akai EIE Audio Midi USB Hub 4-In Recording Interface - BRAND NEW Brand New, Factory Sealed, Full Warranty, Retail Buy!!
$273.66 DJ Tech USB DJ MIDI controller w/ headphones & external sound interface	$153.95 Tascam US-600 USB 2.0 Audio/MIDI Interface. NEW - US600