I have a Old Soundstream edge 4220 i can go for $190 shipped. Its a little under rated.
# 4 X 110 RMS 4 Ohm
# 4 X 220 RMS 2 Ohm
# 2 X 440 RMS 4 Ohm Mono
# Fully regulated, MOSFET power supply
# PWM circuitry
# Bi-Linear in/out selectable crossovers (Hi/Full/Low)
# Continuously variable 12dB low-pass crossover (40Hz to 120Hz)
# Continuously variable 12dB high-pass crossover (150Hz to 1.5kHz)
# Variable 0 – 18dB subwoofer equalizer (40Hz-120Hz)
# Continuously variable phase alignment (0°-180°)
# Tri-guard amplifier protection
# Intelligent Distress indicator (IDI)
# Platinum RCA input and output
# OEM floating ground input
# Platinum 4 gauge power inputs
# 2-ohm stereo/4-ohm mono stable
# Tri-mode operation
# Damping Factor 200
# Optional REmote Bass Control (EGA-RM)
# 10Hz – 30 kHz frequency response
# >97dB S/N ratio
# >0.02% THD
# Dimensions 17.7" L X 2.2" H X 11" W