If you look at the dustwasher, the brand is "Zippy" not Sanwa. Zippy joysticks are pretty cheap - around $5-7 retail. Not sure what the buttons are, but I would assume not Sanwa so perhaps 75 cents each. The plexi you can buy for a few dollars, but of course would need to laser cut. I can't see the wiring - would be nice to see how it is wired. This costs a lot for what it really is, considering the Pi is extra. Neat design, though.
Jmandmcthis...given the stick and the fact that the brand of the parts aren't otherwise mentioned/advertised, I'm willing to bet it is all low quality junk, definitely not worth the cost of the item.