Im just curious..if a manufacturer has $400 in cost what do you think they should sell it for? I've been in manufacturing all my life and the formula commonly used in large durable goods is material cost x 2.53% or divide by .40 I think and bill labor at 3 x pay rate..otherwise you are pretty much goin to loose money and that doesn't include any engineering if required that strait manufacturing no prototyping cost.If you walked into a machine shop tomorrow 9 times out of 10 they will start with that formula and adjust on quantity material buys. So if you make something for $400 how much if fair to you? $425.00, 500.00, 600.00? if you apply the traditional formula 400 x 2.53, you would be at $1012.00 then add labor to prep and package..so if you look at it like that it is under priced...the cheapest you can do it using the exact same components, not DIY tubs, cheap pumps, and no plumbing, is still over $400 bucks and you have to track it all down, cut all the tubes, cut all the buckets and that was me buying buckets 45 at a time to get the cost those down..if you think $900 is to much then don't buy one and build one yourself but quit bitchin all the time about how much they are..