I traded away a fresh bottle of Double Daisy Cutter for Double Sunshine a few months ago. Recently in two separate trades I sent away Zombie Dust $4$ for the Triple Play IPA which I actually prefer to the Double Sunshine.
Yup, as of last week (5/14, I believe). And that is one fine-ass DIPA! I swapped some Alpine for two bombers (one DS, one Sugarhouse) back in January or February, and now can only lament the post-Expo release decision by Alpine to cut off bottle distribution to LA. Not only am I short on hoppy goodness to trade, I'm beginning to suffer from serious Pure Hoppiness withdrawal >_<
I traded a bottle for a Bruery Otiose, opened one with my coworkers, split another one with muskabeatz, and gifted another bottle to Cari from Upland.
I've seen a few threads where DL:2x DS happened. So it looks like it goes $4$ with pretty sought after beers. DDCS should happen $4$ if you can get DDC, otherwise similarly hard to find beers should get it done.