This is the detail page for one of over 225 audio interfaces covered in The Computer Audio Interface Guide, which also lists where to buy this interface used.
24 bit on the digital I/O. 20 bit on the A-to-D and D-to-A. 2 mic pres with phantom power, 2 HI Z instruments, 4 stereo line inputs, phono preamp, S/PDIF i/o (optical and coaxial).