I just picked up a couple of used Oceanic computers from ebay (for around 100 bucks each) for students to use. I still teach tables but standards for SDI require a computer and I have been letting students use my Shearwater Perdixes. I've decided that since it's unlikely they will choose to spend nearly a grand on their first computers, having the Oceanic Veo 100, 180, and 200 will give them nice, simple computers they can see buying after the class from whomever they choose to.