I bought a Genie from a very nice couple that had to get rid of it. It was stuck on tilt and didn't work. I paid $500 for it and it's in gorgeous shape, vibrant like new. I bypassed the slam switch and it booted up.
The drop targets don't reset, the playfield lights seem confused, and the scoring is screwy. It seems like these problems might be related to a single solution, but I could use a little direction.
Also, someone had done some odd work on one of the boards, cutting the wires from the connector and soldering them directly to the board. Then they replaced a transistor, and almost burned completely through the board. I'm suprised it even turned on. I've since replaced the board with one I had sitting about.