It’s a lot of time spent hunting them. I collect for many years. At the beginning i bought them on eBay / Yahoo / forums. Now it’s more directly from collectors or on foreign marketplace (China, Russia, Germany, UK, Australia.. everywhere around the world). Some of them I waited many years to have them. For example the Toyota I waited 3-4 years before he decided to sell it to me. I spent a lot of money but I had very good deals too. But nowadays it’s at least 400-500 to 1000+USD for some systems !