Heart Attack! GROAAA! ARGGG! *dies*
eBay Auction -- Item Number: 120686973104
This isn't the Apple II controller it is the circuit board from inside the Corvus drive itself. Personally, I cannot see why anyone would bother to disassemble one of these drives unless it's to repair another one. The drive mechanisms are useless by today's standards and you'd need to find comparable parts to get one working with another system anyway so why not just leave the drive in the case? Who is going to buy an 8" 5mb or 5.25" 10mb MFM/RLL drive mech by itself anymore? Most of the popular vintage computers have IDE/SATA or CF interfaces available nowadays.
And this is another reason why ebay stores should be included in searches. How the hell are you supposed to find something in an ebay store that you want to buy if it doesn't show up in a search? If I was paying money to ebay for a virtual storefront I'd damn well want every item I have to show up in searches so I have a better chance of selling them.
Believe it or not, I think it was last year, someone on ebay UK had a Corvus drive with PC interface for sale. I was tempted to bid on it, win, and tell the guy to send me just the interface and do whatever he wants with the drive. I wish I had done that. It might have been worth it.