Preowned Mackie ProFX12 12-Channel Effects Mixer - Very Good condition
The only reason it is not rated "excellent" is because of the marker on the bottom. Other than that it is really in Excellent working condition. 
Product highlights: 12-channel mixer

• channels 1-4:
• • mono mic/line inputs (XLR and 1/4" TRS)
  • switchable high-pass filter (100 Hz, 18 dB/octave)
  • insertion (I/O) jack
• channels 5/6 and 7/8
• • mono mic and stereo line inputs (XLR and 1/4" TRS)
  • switchable high-pass filter (100 Hz, 18 dB/octave)
• channels 9/10 and 11/12:
• • stereo line inputs (1/4" TRS)
• switchable phantom power (+48 volts) on all mic inputs
• 3-band EQ on all channels
• • high: 12,000 Hz (shelving)
  • mid: 2,500 Hz (peaking)
  • low: 80 Hz (shelving)
• OL (overload) lights on all channels

Special features

• PC connectivity via USB
• Tracktion 3™ music production software included
• • compatible with Mac OS X 10.4.11 and later, and Windows XP, Vista, 7, and later
• Running Man FX processor (RMFX™) with 16 effects
• 2 auxiliary buses
• • Monitor: pre-fader
  • FX : post-fader bus to effects processor and effects send
• 7-band stereo graphic EQ on main mix or Mon output
• Break button mutes all channels but tape and USB inputs
• line/hi-z switch on channel 1 allows guitar input without a DI box

General features

• LED output meter with peak indicator
• PFL (pre-fader listen) for metering and monitoring individual channels
• mute and pan controls on each channel
• headphone output
• steel chassis
• dimensions: 14-5/8"W x 3-5/8"H x 14-1/16"D
• weight: 9 lb