link: http://www.ebay.com/itm/272621534373 Picked this up in a box of boards that appeared to have come from a scrapped out Altair 8800B Turnkey system. They've been electrically tested -- they don't draw excessive current, nothing gets hot, and they don't prevent my IMSAI 8080 from operating. I don't have disk drives so no further testing has been done. Guaranteed only not to have exploding regulators or exploding capacitors BIN price based on the kind of prices I've been seeing for the disk drives. Make an offer if you think it's too high. Do note that these controller boards are intended to work with MITS drives, not industry standard Shugart interface drives. Thanks, Jonathan