USB controllers in the USA can vary in cost, with options available for simple models featuring built-in micro-controllers. The PIC18F4455 is recommended for its USB libraries and is suitable for R&D projects. For purchasing, Findchips.com is suggested as a reliable resource for checking pricing and availability, with listings from suppliers like Digikey. Additionally, Arduino offers alternatives for those seeking micro-controller modules with USB connectivity. Overall, there are multiple avenues to explore for acquiring a USB controller that meets specific project needs.