Just got a Pioneer SX-828, SX-680, SX-650, SG-9500 and a Sherwood S-7200 for $100! All of them are needing cleaned cosmetically and the pots and switches as well, the 828 also has a broken antenna mount and is missing the jumpers, but all of them work! The guy I got this stuff off of was the original owner of the SG-9500.
Here are some before photos of the 828, it's very dirty, more then the photos show. More to follow of the other stuff.
A sample of the dirt that's on it.