Purchased new in February this year. I've played it 30-50 hours as I own some other nice cartridges. It is nothing short of mint condition as the magnified pictures indicate.
If you own a heavy tonearm the stone body Koetsu carts are a top match for it. Need the funds for a preamp I have my eye on.
"The outrageously expensive Coralstone Platinum has a platinum magnet system, silver-plated copper wiring, and a proprietary stylus shape. It combined "sensational" image specificity and three-dimensionality with "an uncanny physicality and weight" across the entire frequency spectrum. MF: "There's no excuse for the price, except the sound. So get over it."
Koetsu Coralstone Platinum Cartridge Specifications:
Type: Moving coil
Coil wiring: Silverplated copper
Magnet: Platinum magnet
Stylus type: Proprietary
Cantilever: High strength boron
Output volts: 0.3 mV
Frequency response: 20-100,000 Hz
Channel balance at 1 kHz: Better than 0.5 dB
Channel separation at 1 kHz: Better than 25 dB
Inner impedance: 5 Ohm
Recommeded impedance: 30 Ohm
Weight: 12.5 g
Compliance: 5 x 10-6 cm/dyne at 100 Hz
Thanks for looking!