Before you buy a 3D printer you must ask yourself, what will I be using this printer for? Are you an aspiring entrepreneur that wants to be able to create models, or are you someone who wants a high tech toy. Whatever the reason here is a list of 3D printers for five of the most common categories of desktop 3D printing. These categories include Prosumer, Workhorse, Plug ‘n’ Play, Budget, and SLS (selective laser sintering) 3D printers.