I would look at ebay sold listings as a gauge, as opposed to dreamer active listings prices.
Those are nice, no breaks at the spine.
The little rubber channel piece on the spine to protect the glass is missing though, can't tell if the little bushings to secure the hold down fingers are there?
What sort of inserts are in the car for mounting, the dealer install well nuts (see AMK Products), or just metal rivnuts?
Are the hinges, hold downs and gaskets original too?
Very popular 69 item regardless of originality, most people throwing money down for these cars are happy to have the louvers.
If you're not totally sure, don't be in a rush to unload them.
If you need parts, try a WTB in this sites classifieds, and maybe trading the louvers for parts needed would serve you better.