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6th Ave via eBay is featuring the RF 5.2mm F2.8 L Dual Fisheye for $1479.95. As they are not an authorized dealer, this is likely grey market and a Canon USA warranty is not guaranteed. This is a great price, though, compared to the regular price of $1799 for this stereoscopic lens.
Not really a great deal given these been on sale for $899 just a few months ago.
I think that previous price was a price mistake, and very few were purchased. Did anyone actually have it ship?