Building your own printer is a complex project, so if this is your first printer we recommend you build a kit instead. There are a lot of components in a 3D printer, so me made an information page on what components you need to build a printer.
ReprapWorld is the number one webshop for all your reprap supplies for your 3D printer. We have a large collection of 3D printer components, from our famous electronics lines to filament from our own production. And everything is at a very competitive price!