Not sure how you're figuring that. Your math is off.
That Odyssea is $150 + $30 = $180 BEFORE shipping. The $30 charge is for oversized shipping and you have to add that in to the cost. If you don't get free shipping, add shipping on to that as well.
You can find FX5's for $200 shipped to your house. If you can't, sorry, but that's a reasonable price, and I see them for that and cheaper all the time. If you pay more, that sucks for you. And $30 for filtration is not out of the question if you set up your filtration correctly. Granted, if you use all eheim media, it's going to cost a lot more. But $30 is definitely reasonable. So that's $230 with everything shipped to your house for a FX5 with media.
That's a $50 difference between a FX5 and this odyssea thing. And that's not including shipping on the Odyssea. If you don't spend an extra $50 with the company selling the Odyssea (you have to buy $200 worth of stuff to get free shipping with them), you're going to be paying shipping as well, and that will just bring the cost difference closer.
Again, for $40-50 extra, I'll take the FX5 all day every day.