Yamaha RBX170 Electric Bass Guitar - Used. The RBX170 represents a price breakthrough for the RBX range, yet the quality is everything you'd expect from a Yamaha bass. Normal wear, dings & battle scars of a daily driver. The item "Yamaha RBX170 4-String Electric Bass Guitar Used" is in sale since Thursday, December 23, 2021. This item is in the category "Musical Instruments & Gear\Guitars & Basses\Bass Guitars". The seller is "buythese" and is located in Encinitas, California.