They are so insanely expensive considering you can make your own for under £5
I wonder why they are so expensive.
Because for $30 more, someone builds it, tests it, boxes it, ships it to me, and warrants it. I do not have the free time for all of that. Until I do, I am not opposed to $35 a pop.
I hardly call that foolish. It is worth what people will pay for it.