I agree that the sales price is below what the market value should be, which is why I'm not selling mine. In fact, it's looks like a good time to buy, but I have no BTC to spend yet--sadly. I'm guessing it's just dumpers offloading their early mines. If not, then the difficulty should decline as people exit, right?
That said, I think your math is wrong. Granted, I'm new at these calculations, but I have a math background and the calculations aren't terribly difficult to work out from the source code. I've been running the numbers, and the block average for the first 50,000 blocks would be a reward of right around 5,900. Intervals are 60 blocks which is ~2 hours. In those 60 blocks, the source shows that 1 in 4 coins is a 2x reward, 1 in 16 is 10x reward, and 1 in 1024 should be a 250x reward. Plus, for the first 50,000 blocks there's a 1.25 multiplier from what I read. The code looks accurate as far as I can tell. The values then come to: 2,785, 5,750, 28,750, and a whooping 718,750.
If so, then within a 60 block range there should be 41.191 - 1x blocks, 15 - 2x blocks, 3.75 - 10x blocks, ~0.0586 - 250x blocks. When you add those values up (41.191 * 2,785) + (15 * 5,750) + (3.75 * 28,750) + (0.0586 * 718,750) you get: 114,716.935 + 86,250 + 109,497.25 + 42,118.75 for a total of: ~352,583 coins within a 60 block cycle. That works out to an average of 5,876.38 coins per block. Which should work out to roughly: 116885.27 BNS mined at 1TH/s.
At least I think that's right. It's why I decided to mine this launch, and keep mining at various points, so hopefully it's right!