none of the k badges you see on ebay are trademarked. the klexus k isn't even an oem design so kia doesn't care at all about that one. their vintage k is too close to lexus in the usa so they can't trademark it. this new kia logo design, however, they're going to hold close. and i seriously doubt they'd want to see it being sold online before they use it on a car. that'll play it out before they even get a chance to use it themselves.
you're probably right that somebody will start selling one soon. but i hope they don't invest too much money because they're gonna get a cease and desist letter real quick.