I have used CPO Bosch a couple times and been completely satisfied. The discounts aren't that big but, if it's an item that never goes on sale anyway, a refurb could save you 15% and carries the full warranty. Add free shipping to that and it starts to make sense.

I tend to use free shipping for those $2 to $10 items I am always forgetting to add to larger orders. . . vac hose adapters, router plates, collets and such.