Ripoff on pricing

I wanted to purchace a xbox 360 at lambton cash crusaders. They had 2 identical console one was blue and one was black price on the blue one was 1249.99 and the black one 1499.99 . I tried to query why same models are difrent price and wanted to nogotiate the sales lady wet to the office and when on return both consuls prices was made At the price of 1499.99 this is unaceptable as i only wanted to nogotiate to have the black console. I have queried why they done it and did not get an answer.