Vid normally I'm with you on your knowledge, but in this case (speaking as someone who has a lot printed) I can't agree.
Maybe there's some cheap knockoffs for that kind of price, but true photographic translites? Not that I know of. And I've worked with a printer before who's printed Stern translites, which is the closest thing to bulk you get these days.
You can skimp a little by not fusing a diffuser layer, but they're still not anything like that cheap.
Those $25 aren't about cost. They're about Terry getting a stack of them for pennies because no one cared, and being priced cheap because no one wants to pay more for them than that.
Now when I price mine I'm factoring in the work that goes into them, not just the materials cost, but I'd lose money on every sale trying to sell them for what Terry is.