I have a used prosport oil pressure gauge with all of the hoses and wiring w/ an custom A arm to hold the gauge.
Prosport Amber/White Electronic Boost Gauge 52mm $100 plus shipping
I have a Kartboy throw shifter that is used, with bushings (front and rear) that have never been used. $100 plus shipping
These items came with the car when I bought it. I have never tested the gauge but I was told it worked. Obviously the throw shifter works and the bushings have never been out of their package.