What's a Phoenix Gold QX 500.1D worth?

I have a Phoenix Gold QX 500.1D amplifier. Its in excellent shape and I'm thinking of selling it. I have looked across the internet for info on value, but nothing is available. So I figured I would ask you folks.

Features:

• High efficiency Class-D circuitry
• Continuously variable 18dB per octave low-pass crossover
• 18dB per octave subsonic filter
• Dual-color LED indicator for power-on and protection
• Adjustable input sensitivity control
• Adjustable 0 to 15dB Twin-"T" 45Hz bass boost
• Muting circuitry for soft turn-on and turn-off
• Advanced overload and thermal protection circuitry
• High current bussbars for all high current, high voltage stages
• PWM Mosfet power supply
• Gold plated high current power and speakers terminals
• Gold plated RCA level inputs
• Crossover configured RCA level outputs
• Optional LPL wired Low Pass Level controller
• Optional RMD Remote Monitoring Display port
• Isolated mounting feet
• QLINKable

Subwoofer Mono Amp Specifications

Amplifier Type: Mono RMS Power: 250W x 1 @ 4 Ohms THD at 4-Ohm RMS Power: n/a RMS Power: 500W x 1 @ 2 Ohms Speaker Level Inputs: No Preamp Outputs: Yes Built-In Crossovers: LP Bass Boost: 0-15 dB Frequency Response: 20-350 Hz

I don't recall this series being one of phoenix Gold's outstanding or exceptional series, but none the less a solid amp. So either sell it here and take the highest amount or off to e-bay where you might start the listing around 175-200. At least that's what I would do. Here is a link for a four channel on ebay.. http:///.com/Phoenix-Gold-QX-150-4-Car-Audio-Amplifier_W0QQitemZ5820116085QQcategoryZ79820QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

What did you pay for it originally?

If only it was an ms series

$85