I have 6 of these AR boards for games like Paperboy etc. These are all untested but look to be in good shape. Asking $20 each + shipping. Get all 6 for $100 + shipping. Don't like my prices? Make an offer instead of whining about it.
Note, that these are the AR-3 version which are fatter than the regular AR-II's found in Centipede, Star Wars, Dig Dug etc. These are for the System 2 games and perhaps a few others that I am not aware of.