When it comes to strikers,, it's all about the temper an the "sparks" they make.
And that's a hard thing to show with on-line photo's of how pretty they look. (I get that)
I've a few 1/4 square rod "U" shape steels that will shower heavy yellow crackling sparks to the ground with a standing position single strike.
Not counting the simple rock shards, can you show how are these worth over $30 each?