Are all Ender 3's equal? There are so many sources to buy from and I don't know what I'm looking at. For example, this is the lowest priced one in Amazon: Creality Ender 3 3D Printer Aluminum V-Slot Prusa I3 DIY with Resume Printing 220x220x250mm https://www.amazon.com/dp/B07F3YZ9HL/ref=cm_sw_r_cp_apa_i_K1MVCbDS5HE34
But is it a good purchase?