$10-15 if I'm going by wishful thinking, but $15-20 more realistically (for such a small-time operation). Oh, and grangers only. I have a feeling you'll just lose money on anything else, especially the marines. :P
It also depends on what kind of materials and construction they use. You know, just how close to its subject these guys can make it look, because plushies often come out looking cheap and awkward.