I think most users are confusing buysellbitco.in with other large exchanges like, Gox, Coinbase, BTCe etc. BSB operate sort of like a single party who buy/sell bitcoin from the community. They have a variable transaction limit and their business greatly depends on the market stability. There are other individuals who do the same business here, but they do without a store front. None of them will sell BTC during a crash, because they have gained their share of experience surviving these. So it is understandable why BSB pull down the curtains during a crash.

Even I wish to put some money on BTC during this crash, but for that I should go to an international exchange where I can make instant buy/sell decisions.