No, I didn't ask. I suppose I could. I think I decided that it was probably a promo type thing based on the fact that they have a lot of Adidas and Mitchell & Ness (previously owned by Adidas) stuff that all seemed to be from a legitimate (possible overstock) type of line. I've seen a fair amount of other retailers getting these promotional type items, at least in more niche sports, like say lacrosse. You'll see some lacrosse stores get say an Under Armour lacrosse glove for Maryland, but their regular glove might be a different model. So it's a legitimate model, but necessarily what the team is wearing. It's a bit different with lacrosse as you won't see too many lacrosse jerseys for sale, so it's not quite an apples-to-apples comparison.
I do recall seeing some Under Armour gear for University of Minnesota Duluth that looked very close to the stuff worn on the ice, but was slightly different. I'm not sure if promotional is the right word, but it's kind of like Under Armour creating a range of legitimate stuff for their teams, but only some of which will be mass produced/chosen by the school/team.
Here is the seller's store: https://www.ebay.com/sch/setays13/m.html?item=183853365382&ssPageName=STRK%3AMEBIDX%3AIT&rt=nc&_trksid=p2047675.l2562
I'll shoot them a message to see if they'd give me a straight answer.