Permissible and impermissible items of trade

Selling a TV

Q: I would like to know the masala regarding the selling of a television. One no longer has the use of a TV and wishes to sell it. Please advise as to which avenues that wealth could be spent in e.g. sadaqah etc?

Giving secular tuition and selling secular textbooks and notes

Q:

1. Is it correct to give tuition to students studying at secular universities? It would involve a male giving tuition to other males only.

2. Is it correct to sell the notes, past papers and textbooks etc. for certain subjects at secular universities?

3. Is it correct to sell the notes, past papers and textbooks etc. for certain subjects at secular correspondence universities (like Unisa)?

All three questions above relate to permissible subjects viz., mathematics, accounting and computer programming.

Selling items which are not declared

Q: I buy burqas from south africa to sell it back in my country. Not in a shop but personally. Now the law at the airport in my country is that if we bring any types of items for sale we should declare it and pay a tax on it (if they allow us to take it back from them). If i do not declare as such and sell them will the income that i will receive halaal?