PIONEER DJM 600 MIXER ?

I am selling my mixer due to upgrading to a digital set up. Have owned for a few years and was serviced about 4 months ago. New faders, channels, clean up and checked. Works perfected including all digital functions. Channel 3 has a slight crackle when moving near the top. Have included spares of a spare channel and a crossfader. Description.... The DJM-600 is a powerful 4 channel effects mixer with such great versatility that it is one of the most popular mixers on the market. The DJM-600 boasts an intuitive range of Beat Effects and a multitude of channel and cross fader options. The mixer features an Auto BPM function as well as a broad range of beat effects that give you complete control over effect intensity. The mixer also works as a beat sampler, with recording and play modes. This means DJs can capture up to eight seconds of sound and play it manually, or use the Auto Loop Play to loop the sample seamlessly. The Stretch Play feature can be used to manipulate the tempo of the sample with the beat. Packed full of powerful effects and sampling functions, the highly durable DJM-600 remains a first-class choice for DJs the world over. Available for collection from Shepherds Bush area.