The blue Alps Model M clone is known and documented but is also quite rare and valuable.
An unusual case of a counterfeit being worth a lot more than its original.
I have never seen one in real life, but would love to have one. If I was flush with cash (which I am not) I might almost consider it, even at that price, but if that "X" on the "D" key is permanent marker it is a real shame, because those caps must be uber-rare and replacements almost out of the question.