Midmark · Dental Equipment · $7,000 – $15,000
Price spread of $7k–$15k tells you everything: low end is 8,000+ operating hours with worn upholstery and a service gap over 2 years; high end is under 4,000 hours, full Midmark service history, and original hydraulic pump. A chair with missing service records costs you $800–$1,200 in immediate recalibration and seal replacement.
Physical walkthrough: pump a test cycle 20 times in each position and listen for grinding (bad seals). Check the upholstery seams for splits - vinyl repair runs $600+ per panel. Grab the armrest and twist; if there's play, the mounting brackets are loose and that's a $400 fix you're eating.
Southern California and Texas are moving fast on UltraComfort units because DSOs are consolidating and trading up to newer Midmark models with digital integration. Irvine to San Diego corridor alone, I'm seeing 4–6 units per month on secondary market.
| Model | Brand | Used Price | Key Spec | Value Score |
|---|---|---|---|---|
| Midmark UltraComfort ✓ | Midmark | $7,000–$15,000 | Dental chair, ergonomic, 300 lb capacity... | ●●●●● |
| ProMax 3D Plus | Planmeca | $40,000–$85,000 | CBCT 3D imaging, cephalometric, 23x26cm FOV... | ●●●●○ |
| OP 3D Pro | KaVo | $35,000–$70,000 | CBCT 3D, 16x13cm FOV, low dose... | ●●●●○ |
| Orthophos SL 3D | Dentsply Sirona | $38,000–$75,000 | CBCT panoramic ceph, 11x10cm FOV... | ●●●●○ |
Run the chair through 50 full cycles (recline, raise, rotate) in one sitting. If pressure holds steady and you don't hear hissing, you're good. If it drifts down 2+ inches over 10 minutes, the pump seal is separating - that's a $1,100 rebuild.
A-dec 500 is heavier, more modular, and costs $2k more used ($9k–$17k). UltraComfort is lighter, faster to recalibrate, and parts inventory is cheaper. Pick UltraComfort if you change operators frequently; pick A-dec if you want 10-year lifespan and custom configurations.
The $8k chair has 9,000+ hours and likely needs new upholstery ($800), seal kit ($400), and 6 months of unknown wear. $12k unit has 3,500–4,000 hours, service records, and typically 2–3 years left before major service. Do the math: $8k plus $1,200 in fixes versus $12k with zero surprise costs.
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I source refurbished units with full 90-day pump warranty and save clinics $2,400–$3,600 versus buying new. Also handle removal and reinstall at your location - typical clinic loses 3–4 hours of production moving a chair in-house.