Looks like this might be a stereopticon (I"m not an expert on that) which, as I understand it, was designed to have double images instead of one. The unit is less common than a standard magic lantern, but whether it is more valuable, I don't know. It doesn't necessarily look in great shape. If it is a stereopticon, the lenses would probably be identical. Could you find a buyer for the unit - maybe, but I doubt you could get a whole lot for it especially if you separated the lenses from it. One company that made a lot of Stereopticons was the Macintosh Stereopticon Company (hope I got the spelling right).
Are the lenses worth more than $200 - possibly since Projection Petzvals are going up in price because everyone wants them. However, I bought a Projection Petzval for a stereopticon a few months ago for less than $100. It is labeled by the Macintosh Stereopticon Company. If the lenses will work for an 8 x 10 camera, the demand (and price) will be higher.
Hope this helps.