There are always deals, but their not always seasonal and there's no predictability. If I see any good deals, I'll pass them along your way via this thread if the Mods allow it.
By the way, I just got my Geno 2.0 kit from National Geographic, and if you want a good deal, this would be it. You get your maternal subclade ancestry and autosomal information in one. It also compares your results with recently discovered Denisovan and Neanderthal DNA, since most people with origins out of Africa (Europe, Asia, Indies) have some admixture.
Typically a mtDNA test costs over $200 by itself, and autosomal is another $300. NatGeo has it for $200 for both. Who knows the price might drop for the holidays. That's a bargain CC.