Sasha from waves has no byteballs left to sell, he sold all he had for 35 BTC. Sasha can't sell his byteballs twice, he's dumped them already.
I doubt he sold all of them, he never said that ...
How many byteballs they get? I suspect they got about 4000-5000 GBytes. With price around 0.01 BTC/GBytes, and low to 0.007-0.008 BTC/GBytes, they probably sold all and got 35 BTC, they probably dumped at any price.