Yes, it was a limited edition with only 90 pairs produced, and also, another 90 pairs in green with the same type pattern. Over many years, B&W has produced other limited edition models, so this is not that unusual for them.
Sorry, but you can come down out of the clouds, as it doesn't appear they are worth anywhere near that much. Here are two pair that actually sold on ebay within the past year.
When I clicked on your link and saw $8000, I thought he must live in Colorado, however he doesn't. Who knows why he is asking such an astronomical price. Probably just looking for a sucker with more dollars than sense.