All 3 types (Mini ZMR250-Tricopter 350- MultiQuad 350) of Multicopters here were built as a kit or searched on the web for the best prices in components to assemble the copters. Prices dropped on some parts as competition has driven them down according to supply and demand. They are set basic for easy flight and to do photography if I choose. They have no exotic devices on them like stabilizers, GPS, or RTH features. Just basic flying UAV in here.