The kits on ebay are kits that he had for sale as "old stock that needs to go" here on the forum. I can only assume that the outstanding kits are missing some critical parts that is preventing them from being shipped out. While slow it seems they are trying to fulfill their obligations. We shall see if that ever happens.
I would like to see them survive because they filled a unique niche - HPR upscales of cool rockets with paper and ply. BMS and Semroc don't have the parts for that. Wildman is good in his own way but everything he has is fiberglass. I don't want to source parts from 10 vendors to build something and I don't have access to shop tools, laser cutting and CNC. I don't want to get screwed either - so I'd approach with caution and only purchase something they have in stock if I purchase again.