Beat retail Thang Beat Maker

Product Name: Beat retail Thang Beat Maker
Here I have the notorious Beat Thang beat beatmaker, I know very little about this machine outside that I've looked it up and I know that it costs a lot of money it powers on it comes with an instruction manual which looks like it was downloaded from the Internet, outside of that I don't know much about it retail I'm asking $300 or best offer looking for a quick as/is sale don't be shy. I see these online between $500 & $800, I'm thinking $300 is a damn good price. But as I am looking for a quick sale I am open to reasonable offers. thanks.