I have a good M42 harness from a E30 cabrio, in decent shape. No injector harness, but the rest is in great shape. Includes plenum and firewall wiring channel. I'd take $50 if you're a member here.
I also have four early M52 coils (Bremi) if you wanted some spares for the ever-popular COP plates. $8 each?
Early model M42 throttle body, $25
High temp rad switch (91/99C IIRC) and matching thermostat (90C?). These are used parts, but I didn't run them for long. These will net better fuel mileage and a bit of power since a hotter motor runs more efficiently. The higher temps didn't hurt my motor at all, it's still running at nearly 293K miles. $20/set
Good E36 M42 AFM. I also have the air box if yours has gone missing. $50
Lots of misc. E30 trim parts too, PM me for details.