SCAMMER WARNING: Due to a spate of recent scam attempts (some successful) recently, if you're doing a deal in the classifieds, ONLY USE PAYPAL GOODS AND SERVICES UNLESS YOU KNOW THAT INDIVIDUAL PERSONALLY. It's really not worth saving a few quid.
SOLD: Presonus Firestudio Mobile £25
I've had this firestudio mobile for quite a while, it works perfectly EXCEPT occasionally the headphone output switches to left side only and you have to wiggle the volume knob for a second for it to sort itself out. It then works for a long time.
-Firewire
-Midi
SPDIF in and out
Boxed, power supply and breakout cable.
Super low latency
There's a very detailed review at the following site.
http://www.michalkaszczyszyn.com/en/tutorials/presonus_firestudio_mobile.html