Like new. Only used a couple of times. Cosmetically as new. Fully tested. 
From Aguilar:
Based on the popular Tone Hammer pedal, this superlight bass head combines 3 bands of flexible EQ, a colorful “Drive” control, and 500 watts of power in a 4 lb. package. The Tone Hammer 500 will give you the legendary “Aguilar Sound” while still fitting into the accessory pouch of most gig bags – the perfect choice for bass players on the go.
Features:

• Power Output: 500 watts into 4 ohms, 250 watts into 8 ohms


• Preamp Section: Solid State


• Power Section: Class D


• Transformer: Switching mode power supply (SMPS)


• EQ Section:


• Bass: +/- 17 dB @ 40 Hz


• Mid Level: +/- 16 dB


• Mid Frequency: 180 Hz – 1 kHz


• Treble: +/- 14 dB @ 4 kHz


• Drive Control: Fully adjustable, featuring Aguilar’s proprietary AGS (adaptive gain shaping) circuit


• Effects Loop: Series operation. Adds 6 dB of additional gain, making it useful for a broad range of effects units.


• Inputs: One 1/4″ input jack, compatible with all active and passive basses


• Speaker Outputs: Two Neutrik Speakon speaker outputs


• Balanced Output: XLR balanced output with pre/post EQ and ground lift switch


• Tuner output


• Cooling: Two high-quality whisper fans with thermal speed control


• Dimensions: 10.75”W X 8.5”D X 2.75”H


• Weight: 4 lbs