I think they're a bargain. As a free-enterpriser myself, I am immediately drawn to the "what the market will bear" and "economies of scale" arguments cited above. As one would expect, as the number of users has increased, prices have dropped. These hockey-puck VEOs and similar, at less than $200 new (probably less than I spent on my Dacor MicroBrain in ~1985, in 1985 dollars!), seem like a real bargain to me. I remember spending SGD1,000 (~$700) on a US Divers Monitor II (or maybe III) in 1995, with transmitter, deeply discounted by a shop in Lucky Plaza. I had to have it for my trip to Truk, even though it transmitted tank data sporadically, at best.