I have looked online and haven't had much luck with finding corrugated polyethylene pipe prices and stuff online.

I am looking for prices on both 24" or 36" single walled pipe. How much does this stuff generally run for a 20 foot piece.

Is there a better choice of materials. Where do you get this stuff?

I have not looked at salvage yards but I would think I might be able to get some good deals at places like that. Any help is appreciated.