Hey,
Man, you really shouldn't be selling that stuff together. I wouldn't go near it because I don't need another turntable and mixer, and someone looking for a turntable/mixer may not need an MPC; you have effectively kicked us out from the auction without even trying.
If you don't meet your reserve price, you can relist everything. I think it would be a really good idea to sell each item as an individual piece, then put links to your other stuff so that people can still see it and decide for themselves whether or not they want to buy.
Take care,
Nick