So I picked up the beast today. Lots of goodies.
IBM 5151 unscratched
IBM 6150 tower base unit (with a LOT of serial ports off the back)
IBM 6157 tape drive and cable
Spare hard drives - including a 380MB Maxtor 5.25 full height and a 30Mb full height from a Compaq??
Spare 1.2MB floppy drive
IBM 6151 documentation and all 3 diagnostics disks
IBM AIX 2.2 books + installation disks (there is a LOT of disks)
IBM Model M keyboard
Chicony clone keyboard - an exact replica of the original Model F for the IBM AT except a little lighter and it has an XT/AT switch
Some other random keyboard - cross between XT and AT - 10 function keys but it has a numeric keypad.
Boxes of goodies like OS/2 Warp 3 manual, Netware CDs, Windows NT4, 127MB IDE, SoundBlaster Pro (sweeet)
Wyse WY-50 terminal (but no keyboard, damn it)
I also poked the Zilog - under the flap is a tape drive btw - no floppy.
Owner is a nice guy, he used these machines to run terminals back in the day.
But the best thing is I just powered it up. It worked first go :S I'll take a video of the startup sequence. There is something about a machine which waits to power up the hard drive that makes it an experience. The whir of the fans, the LCD diag readout checking over, then up comes 14 and a few seconds later the sound of a 5.25" full height ESDI drive roaring to action.
It's heavy as heck though, to move it more than a few metres I'd recommend two people.