While I won't say exactly since pricing has been on a per quote basis by project, what I will say is they were by far the best price after I checked several local shops and a couple of well known pinball plastic makers I discovered here on Pinside. I made my own outlines in Illustrator, converted to PDF, and they took it from there. I've done four orders with them since March and have another I'll be sending them in the next week or two.
I was previously making my plastics by hand using primarily pneumatic cutters/grinders, and then later moved to a CNC machine but still would have to hand sand then flame polish the edges. The time, the mess, the effort, absolutely one of my least favorite things to do as a mod maker. As a matter of fact, I needed a one off piece this week and after not getting motivated after two days to go out in the garage and knock it out, I just placed an order with UpKick, and I'll have it in a couple of days far better than I could have done myself.
If you have pricing questions or want to ask anything else, I suggest you do it firsthand by contacting them at [email protected]
Kind of hard to photograph, but here is an example of 3 of the pieces they've done for me. Crystal clear, very precise cuts, and very clean/smooth edges. For scale, the large arc piece is about 8" wide. Challenge to everyone to see who can be first to correctly identify what pin these are for (Hint: while all 3 of these are custom, the shape of one of them is the same shape of a metal piece that comes installed in the game).