Online is a toughie.. I went through the regular jobbers and got mine from Frontier ($60 for the 18, $50 for the 14, both aluminium). Maybe a buck or two cheaper at Don Park, but not enough to justify making a special run. I think they were $80 and $60 at the big orange. <-- This is Canadian pricing, so ymmv
How much do they usually retail for south of the border? BTW I checked e-bay but once shipping from the US was factored in, I think the pricing was close to big orange - big hunks of metal, across international border.
I get mine here. They're cheap, they have replacement parts and they're just as good as Ridgid. In fact, I'd say they're identical. They're not made in America, but Ridgid isn't made in america any more either. Argco is an honest company and would replace them or refund you if you weren't happy.