Yeah,ive only seen 3 cases of echinocereus being sold here. Its not manufactured(or very rarely) in dutch wholesale, and the ones ive got are quite ugly, and partially pest eaten. Like i said, ive got the hang of the gritty mix quite recently...... And i know they are slow, and never seen one bloom either. Tried germinating from seed, think i succeeded , but that being said, ive got no IDEA what i have .
As for the opuntias, never seen one bloom from wholesale, and in recent years, they havent been sold that often either......and that involves non hardy cultivars. The hardy ones, im trying from seed, but no seedlings so far.

. Bear in mind
- i need a phytocertficate and a lot of money just to import common plants
-local plant production is too random and unpredictable, but mostly is just common stuff
- dutch plant imports only have good stuff in them 1/10th of shipments(and there are 5 or 4 yearly).
- seed selection is VERY limited when it comes to opuntias.
Moral of the story? Consider yourself very lucky with specialist nurseries. The nearest one to me is 200km away, in a different country at that.