In the Napa EM house in Brit there is a statue where you can get these. I counted 40 people in 5 minutes grabbing these robes yesterday - and most of those names I didn't even recognize (and I've been on Napa for years).
IMHO not a rarity... just more pixel crack that people are going to cross-shard for mega gold to those who dunno any better.
The Tal'Keesh robes were hand given by Theowulf (or whomever was the EM) to individuals who played on the Tal'Keesh side of the event. Those I would consider event rares.
These Jenkins robes are not the same sort. People who didn't even attend the event are grabbing them. Players are using their alts to grab them. Until the EMs remove the distribution demon... those robes are going to be flooding the market.
I wouldn't even pay 1000 for them.
maybe 500.... if even that much.