The 710's from PAS have been hovering around that $400 price point for several weeks now. But the pricing on the other units don't make a lot of sense; the PRX712 runs $699 across all three vendors while the PRX735 & PRX715 are both just 1 Ben Franklin more...really odd..
It's all supply and demand.
What something sells for has nothing to do with the cost to produce it, the cost reflects what people are willing to pay for it and how quickly somebody wants to move the stock.
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