I have an extra Subaru security system upgrade for the 2003 Forester (won't work with the new XT). This has never been installed, although I did open it to check if everything was in there. It goes for ~140 without shipping online, and I'll let it go for $75 for local pickup. Part number is H711SSA100.

I work in the South Bay, and live in SF, so I'm flexible for locations.