Good suggestions about the questions (hey that rhymed!) I see a blue darwinara for sale by this guy, but I've looked elsewhere and can't find any for sale right off hand. Is it off season for these? I see that orchidweb sold them at one time. It's not something real high on my list, but I've heard they are on the easier side to raise and bloom so that makes me kind of want one
Darwinara would eventually be available through other vendors if you have the patience. I wouldn't expect them to be particularly seasonal in sales though anything is likely to featured when in bud/bloom and that is probably summer peak for Darwinara. They are a great choice for a starter Vanda type, compact and generally easy.
Shipping charges from this vendor are on the high side, so if you decide to bid keep it near the minimum or it will end up being more expensive than this plant should be. Do ask a question and wait for an answer before bidding.