I'm thinking about bidding on these and picking them up locally. I've had a Quadra 610 before but never a 660av. I can also pickup IIgs from the same person for $3. They might be worth playing with.

http://cgi.ebay.com/2-apple-Quadra-660av-1-works-1-parts_W0QQitemZ200107436834QQihZ010QQcategoryZ51046QQssPageNameZWDVWQQrdZ1QQcmdZViewItem