"Dynamic" is just a importer's name put on a generic Taiwanese or Chinese mill. This is a standard practice for a lot of companies to make a generic machine without maker's identification. An importer attaches whatever name he/she wants to the machine. Big problem with this is that there is no way to identify the actual maker for quality or repair parts. If something goes wrong, you are either up a creek or make the part yourself. Pricing should reflect that.
Tom