This equipment has long been very popular in Commander. EDHREC has Whispersilk Cloak played in 9 percent of all possible decks. Also, on Amazon, Whispersilk Cloak typically sells for about twice the price as on TCGPlayer and other major Magic card retailers. This is a sign that the card has plenty of casual demand, as well. It's a classic way to protect your best creature. The only reason there was a buyout of the Planechase 2012 version is that it simply is the rarest version available. But it's really not worth the extra $3 over any of the other versions.