Check the listing for details. Ritter 230 Procedure Chair – Pre-Owned, Excellent Condition. Condition: Seller refurbished. Listed at 6000.00 USD. The Ritter 230 is known for reliability, comfort, and efficiency. Its powered positioning reduces strain on providers while improving patient access and care. Why Choose the Ritter 230?. This chair is pre-owned but inexcellent working order, tested, and ready for use in your practice.