I got a (barely used) NI-USB-6255 16-Bit 1.25 MS/s M Series Multifunction DAQ that I don't need and which is now for sale.
The NI-USB-6255 an external box which connects to a PC via USB and which offers 80 analog inputs (16-bit) @ 1.25 MS/s single-channel/750 kS/s aggregate, 24 digital I/O (8 clocked) and 2 analog outputs (16-bit @ 2.8 MS/s).
The NI-USB-6255 is a current product and of course fully supported:
http://sine.ni.com/nips/cds/view/p/lang/en/nid/209157Here is the datasheet:
http://www.ni.com/datasheet/pdf/en/ds-20For sale is the box with PSU and USB cable. Manuals/drivers can be downloaded from the NI website.
As the website shows, the current price of the NI-USB-6255 is over £2500. I'll sell mine for £1250 (or nearest offer) + shipping (I'll ship to almost anywhere, payment via PayPal is OK).