Well, there are a few places I get mine. Sometimes I'll but them at hobby shops near me. But most of the time, I will get them from The Airplane Shop www.airplaneshop.com they have a big inventory most of the time I will get Skymarks models from them. they're 1:200 scale models (most of them) but I also get hogan models, and flight miniatures models. Some people have 1:400 scale airport and they're awesome! They're made by a company called Gemini Jets they have the most realistic models but they're pretty pricey. Just search "Gemini Jets airport" on YouTube and you'll see what I'm talking about.

Happy collecting!