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I have to replace 3 items. I need a cost estimate for the following items: 250GB SATA Hard Drive DDR2-667 2GB Modules (2 Modules) Dell Dimension 5150 Recommended Power Supply

The hard drive and RAM are standard components so no more than $15 for a hard drive that small and about the same for that much DDR2 RAM. It should use a normal power supply so buy anything standard that isn’t the cheapest possible option