Guys, these questions repeat a lot lately. Seeed isn’t the author of any DSO but I think they send some feedback to the authors and act as distributor for international audience. See the post: viewtopic.php?p=5796#p5796
There is Chinese forum with more information where actual designers of the Quad are posting: viewtopic.php?p=5408#p5408
Personally I think people at Seeed should be more clear about it since it’s apparently consufing many people (and they are Seeed customers after all).
It depends on what seller you trust more, I ordered before from Seeed so I preodered the Quad here too. There were other shops showing it, maybe people have experience with them so they order there. The ebay listing states they’re out of stock and will be ready later in April which I guess means they will get next batch from the factory.