Approx. dates of manufacture: 1982-1984
Approx. original price: $150
Approx. street value: None
When Kodak introduced the Disc system in 1984, there were four cameras, the 2000, 4000, 6000 and 8000, in ascending order of price and features. The 2000 was not meant for the US: it was the very basic machine, and it used a 9v battery. The 4000 was the base model with a silverish-bare-metal finish, and all it had was a shutter button and a slide switch for the lens cover. The 6000 was black it had a black cover which folded down out of the way (or under and back so that the camera could sit upright on a table). Since the folding cover protected the lens, the slide switch was used for a close-up lens which slid in and out of position.
This 8000 was the top of the line. For the extra money you got a self-timer, single-shot and 3-shot burst modes; you got a little LCD clock-alarm built into the cover (which is not integrated with the camera at all, so it's just a tiny travel-alarm), and you got spiffy a gold finish. Modern Photography called it gaudy, but that was 1980 and they had no notion of the design horrors the 2000s would bring.
I bought this solely to include here along with the 4000, and because I like paying $2 for cameras that originally cost $150 when they were new.
I recently got an email asking what batteries are in this thing. I didn't know. I checked various places on the internet and nobody else seemed to know either, so I pulled out my pocket knife and prised the cover off (it comes off if you're careful; getting it back together took a little more courage and finesse). Click on the photos for larger versions.
So here's the answer, as you can see. It's two 3v lithium batteries, Part Number 227322. They were made by Matsushita Electric (aka Panasonic). I believe you can find something like them on eBay, or a local battery store may be able to help.