TEARS that these things are not real sets for sale. Lego master Orion Pax has recreated virtually every classic Masters of the Universe vehicle, playset (he hasn't gotten to Eternia yet, but all the rest) and figure as Lego, and I for one am dying to see these happen for real.
My only complaint is that, like Mattel, he's sometimes overly faithful to classic style - a Snake Mountain that's actually to scale, or a four-sided Grayskull, would be amazing to see.
The one major exception is his Marlena Glenn diorama, based on the modern figure and the cartoon rather than anything vintage.
Check out all his designs at OrionPax.de. (Images above are used with permission.)