Cent= $60, pump= $15 mcmaster parts= $40+shipping, printed parts (purchase price, because not everyone owns their own printer)= $50-60 (or, that's what I would probably charge for them all, which is probably lower than others), assorted materials (duct tape, epoxy putty, 2pE, goop, sandpaper, etc)= $30. Right around 200 there.
Right, I'm not using a Cent, I'm leaving all of the 2pE, sandpaper, goop, and whatnot out of my figures because I already have it, and I'm also not using any 3d printed stuff. Yeah, the way you have it set up, over $200 for sure.
I'm working on a similar project, what size hose barbs did you use? Also, where did you come up with $200 for parts? Mine cost less than $100 and It's completely homemade. (To be fair, I did have some stuff lying around that I'm not including in my price figure)