Important but way overpriced!

These plates are almost indispensable on the one hand (eg. As for simple roof structures), but completely overpriced. I paid 44.88 EUR for the three parts including shipping and would imagine that the production costs represent less than 10 percent of this amount. The price has therefore for me something "indecent", but there were no known to me sensible alternative. At least likely to plates for the amount to be slightly larger.