[LAU] Cheap USB MIDI interfaces

A friend possibly wants to set up a Linux system to teach himself keyboards. He's currently looking for a weighted MIDI keyboard which he can do on his own but needs info on what USB-MIDI intersfaces available online at someplace like Sweetwater or Musician's Friend are Alsa/Jack compatible. I'm guessing he'll set up Rosegarden and a couple of soft synths and be very happy. Does anyone have an up-to-date list of what can be purchased new today that works? I use a Midiman Midisport 2x2 which I can still find on Ebay but it's not listed at Sweetwater anymore and everything that is listed seems WAY too expensive to me for this task. ($80 or higher) What can a guy buy for $20-$30 that will get MIDI into his laptop? He's currently distro shopping. Probably he'll go with Ubuntu or CCRMA. Cheers, Mark