Probably legal, I do not see anything strange that could make such a thing illegal. Most of the answers here are also legal, meaning many think that selling bitcoins with cash is legal. I do not know for sure, but it seems legal.
дa дa тoчнo oк
Like someone have rightly said, it depends majorly on the type of country over here, even though the country government have not made their position known, I have seen several entrepreneurs owning shops where they buy and sell e-currency and no one is disturbing them because even the law enforcements agencies probably don't have any idea about what they are doing and they are making their money without engaging in anything illegal.