Harley Davidson motorcycles are highly desirable machines that elicit strong passions in their owners. The document discusses two main model families - the Touring and Dresser models, which are recognizable by their large saddlebags and rear air suspension. It recommends buying vintage Harley motorcycles online through auction sites, noting to carefully read descriptions and ask for additional photos. Research is important when purchasing either online or locally, through test rides, asking questions, and ensuring fair dealings with sellers. A top quality Excelsior motorcycle can also be purchased from a leading company within one's budget.